Journal of University of Chinese Academy of Sciences

Leaf anatomy of Desmos and Dasymaschalon (Annonaceae) from China in relation to taxonomic significance

SUN Tong-Xing, WU Hong, LI Ping-Tao, SUN Jin, ZHENG Xing-Feng

2002, 40 (5): 385-395. DOI: 10.7523/j.issn.2095-6134.2002.5.001

Abstract ( 1133 )

Leaf morphology in four species of Desmos and three species of Dasymaschalon was comparatively studied using scanning electron microscopy (SEM) together with epidermal maceration and paraffin methods. The results showed that there were some remarkable foliar anatomical differences between Desmos and Dasymaschalon. In leaves of Desmos, some of the adaxial epidermal cells were enlarged into globose cells each containing one large cluster crystal, while other epidermal cells were normal without any crystal, and in abaxial epidermis each cell contained one smaller cluster crystal.

The leaf structure was typically bifacial, and the mesophyll cells were differentiated into palisade tissue and spongy tissue. Oil cells were distributed in the second layer of palisade and the whole spongy tissue, and the number of oil cells per mm leaf width ranged from 4 to 6. The vascular tissue in the midrib was separated into bundles by parenchyma cells. In leaves of Dasymaschalon, all the adaxial epidermal cells contained one cluster crystal, and the crystal size was similar to that of the

crystals in abaxial epidermal cells. The leaf structure was more or less isobilateral. Oil cells were distributed only in the spongy tissue between the two layers of the palisade, and the number of oil cells per mm leaf width ranged from 2 to 3. The vascular tissue in the midrib formed a continuous circle. It is clear that the anatomical differences between Desmos and Dasymaschalon are remarkable, supporting the treatment of Desmos and Dasymaschalon as two independent genera.

Cytology of ten species in Anemone, one in Anemoclema and six in Clematis (Trib. Anemoneae, Ranunculaceae) from China

YANG Qin-Er

2002, 40 (5): 396-405. DOI: 10.7523/j.issn.2095-6134.2002.5.002

Abstract ( 1666 )

The somatic chromosome number and detailed chromosome morphology have been studied in ten species of Anemone, one species of Anemoclema, and six species of Clematis, all from China, namely Anemone davidii Franch. (2n=4x= 32), A. stolonifera Maxim. (2n=2x=16), A. flaccida Fr. Schmidt (2n=2x= 14), A. rivularis Buch.-Ham. (2n=2x= 16), A. begoniifiolia lévl. et Vant. (2n=2x= 16), A. hupehensis Lem. f. alba W. T. Wang (2n =2x = 16), A. tomentosa (Maxim.) Péi (2n=2x= 16), A. rupestris Hook. f. et Thoms. (2n=2x= 14), A. trullifolia var. colestina (Franch.) Finet et Gagnep. (2n = 2x = 14), A. trullifolia var. holophylla Diels (2n=2x= 14), A. demissa Hook. f. et Thoms. (2n=2x= 14), Anemoclema glaucifolium (Franch.) W. T. Wang (2n= 2x= 16), Clematis kockiana Schneid. (2n= 2x=16), C. rehderiana Craib. (2n = 2x = 16), C. ranunculoides Franch. (2n = 2x = 16), C. puberula var. ganpiniana(Lévl. et Vant. ) W. T. Wang (2n = 2x = 16), C. brevicaudata DC. (2n= 2x= 16), C. chrysocoma Franch. (2n = 2x = 16). The species of x = 8 in Anemone, and those in Anemoclema and Clematis have very similar karyotypes which consist of five pairs of large median-centromeric (rarely one pair of which are submedian-centromeric) and three pairs of subterminalor terminal-centromeric chromosomes.

A karyological study of seven species and one variety of Cymbidium from China

LI Yu-Ge, GUO Wei-Hong, WU Bo-Ji

2002, 40 (5): 406-413. DOI: 10.7523/j.issn.2095-6134.2002.5.003

Abstract ( 1046 )

Seven species and one variety of Cymbidium are karyologically analyzed: C. qiubeiense K. M. Feng et H. Li (2n = 40 = 24m + 12sm + 4st), C. faberi Rolfe (2n = 40 = 30m + 8sm + 2st), C. faberi var. szechuanicum (Y. S. Wu et S. C. Chen) Y. S. Wu et S. C. Chen (2n = 40=26m+ 10sm + 4st), C. kanran Makino (2n = 40 = 26m + 12sm + 2st), C. cyperifoliumWall. ex Lindl. (2n = 40 = 24m + 12sm + 4st), C. goeringii ( Rchb. f. ) Rchb. f (2n = 40 =24m+ 10sm+4st+2t), C. longibracteatum (Y. S. Wu et S. C. Chen)Y. S. Wu et S. C.Chen (2n = 40 = 24m + 10sm + 6st) and C. serratum (Schltr) (2n = 40 = 28m + 10sm + 2st). In C. serratum, however, counts of 2n = 41, 43, 60, 80 are of occasional occurrence.

Spore morphology of Dryoathyrium Ching from China

WANG Ma-Li, LU Shu-Gang, ZHAO Gui-Fang

2002, 40 (5): 414-420. DOI: 10.7523/j.issn.2095-6134.2002.5.004

Abstract ( 1180 )

Spore morphology of 14 species in the genus Dryoathyrium and one in the genus Luna-

thyrium from China was investigated under light microscope (LM) and scanning electron microscope

(SEM). The spores are monolete, bilaterally symmetric, elliptic in polar view, and semiorbicular or

reniform in equatorial view. According to the surface ornamentation of the perine, the spores in

Dryoathyrium can be divided into three types. Type I is characterized by having lophate processes

on the perine which are connected and reticulate or ornate. Three species, D. chinese, D. core-

anum and D. pterorachis, have this type of spores. Type Ⅱ is characterized by having curved-lo-

bate, lobate or tuberculate processes on the pefine. Eight species, D. boryanum, D. confusum,

D. edentulum, D. henryi, D. okuboanum, D. stenopteron, D. setigerum and D. viridifrons,

have this type of spores. Type Ⅲ is characterized by having spine-like, irregularly baculate or pa-

pilla-like processes on the perine. Three species, D. erectum, D. falcatipinnulum and D. uni-

furcatum, have this type of spores. The spore morphology of Lunathyrium ningshenense is very simi-

lar to that of D. coreanum, supporting the treatment of reducing the former to the synonymy of the

latter.

Morphology and cytology of intergeneric hybrids between Hystrix duthiei ssp. longearistata and Psathyrostachys huashanica （Poaceae: Triticeae）

ZHANG Hai-Qin, ZHOU Yong-Hong, ZHENG You-Liang, YANG Rui-Wu, DING Chun-Bang

2002, 40 (5): 421-427. DOI: 10.7523/j.issn.2095-6134.2002.5.005

Abstract ( 1006 )

In order to determine its genomic constitution, Hystrix duthiei ssp. longearistata was

crossed with Psathyrostachys huashanica. Hybrids were obtained successfully from this combination.

Morphology, fertility and chromosome pairing behavior in meiosis of the parents and their hybrids F₁

were investigated. The results showed obvious morphological differences between H. duthiei ssp.

longearistata and P. huashanica, and intermediate spikes of the F₁ plants between the two parental

species. The hybrids were completely sterile. Chromosome pairing at MI of PMCs in F₁ hybrids was

relatively high and 55.12% of PMCs showed 5 or 6 bivalents per cell. Meiotic configurations were

9.83 Ⅰ + 5.46 Ⅱ+ 0.07 Ⅲ, with C-value of 0. 57, which indicated that H. duthiei ssp.

longearistata and P. huashanica should share one Ns genome. The relationship between Hystrix

and Leymus was also discussed.

Chromosome numbers of 14 species in Amaranthus from China

SONG Bao-Hua, ZHANG Xue-Jie, LI Fa-Zeng, WAN Peng

2002, 40 (5): 428-432. DOI: 10.7523/j.issn.2095-6134.2002.5.006

Abstract ( 1039 )

In this paper, chromosome numbers of 14 species of the genus Amaranthus from China are reported: A. retroflexus 2n=34, A. caudatus 2n=32, A. hybridus 2n=32, A. spinosus 2n =34, A. cruentus 2n=34, A. hypochendriacus 2n=32, A. paniculdatus 2n=32, A. roxburghianus 2n=34, A. blitoides 2n=32, A. polygonoides 2n=34, A. albus 2n=32, A. viridis 2n = 34, A. lividus 2n = 34, A. tricolor 2n = 34. The number in A. roxburghianus is reported here for the first time. The basic chromosome numbers in this genus are x = 16 and x = 17 and both numbers are found in sect. Amaranthus and sect. Blitopsis. The chromosomes in this genus are very small in size, hampering a detailed karyotype analysis.

Classification of Kobresia fragilis C. B. Clarke (Cyperaceae) and related taxa

ZHANG Shu-Ren

2002, 40 (5): 433-443. DOI: 10.7523/j.issn.2095-6134.2002.5.007

Abstract ( 998 )

The classification of Kobresia fragilis C. B. Clarke and related taxa were studied based

on gross morphology and nutlet epidermal micromorphology. About 13 names have been involved in

the species group. They could not be clearly defined using the morphological characters employed by

previous authors. Thus, more than 200 sheets of 89 specimens of related taxa were studied thorough-

ly, and the taxonomic significance of morpbological characters was re-evaluated. In order to further

understand the classification of K. fragilis and its allies, micromorphology of nutlet epidermis of

these taxa was observed under scanning electron microscope. Based on the results, K. curvata C.

B. Clarke and K. fragilis were recognized. Other names were treated as synonymies of K. fragi-

lis. K. clarkeana (Kükenthal) Kükenthal, K. clarkeana var. megalantha Kükenthal and K.

curticeps (C. B. Clarke) Kükenthal var. gyirongensis Y. C. Yang were reduced to new synony-

mies of K. fragilis. K. curvata was distinct from K. fragilis on both morphological and micromor-

phological basis. One specimen of K. fragilis collected from Luqu, Gansu, China, represents a

new distribution record of this species in Gansu.

Taxonomic notes on some species of Elatostema (Urticaceae) from China

LIN Qi, DUAN Lin-Dong

2002, 40 (5): 444-448. DOI: 10.7523/j.issn.2095-6134.2002.5.008

Abstract ( 1068 )

Elatostema bijiangense W. T. Wang, E. medogense W. T. Wang var. oblongum W.

T. Wang, E. shuzhii W. T. Wang, E. obtusum Wedd. var. glabrescens W. T. Wang, E.

sinense H. Schorter var. trilobatum W. T. Wang and E. strigulosum W. T. Wang var. semitripi-

linerve W. T. Wang are reduced to synonymies.

Critical notes on the genus Epipogium (Orchidaceae)

LUO Yi-Bo, CHEN Sing-Chi

2002, 40 (5): 449-452. DOI: 10.7523/j.issn.2095-6134.2002.5.009

Abstract ( 993 )

The differences between Epipogium japonicum Makino and E. roseum (D. Don) Lindl. are discussed based on a specimen recently collected from western Sichuan. The plants from western Sichuan formerly identified as E. roseum are truly E. japonicum. This species is disjunctively distributed in Japan, alpine region of western Sichuan and Taiwan of China.

A new species of Dendropanax (Araliaceae) from China

DENG Yun-Fei, PENG Hua

2002, 40 (5): 453-454. DOI: 10.7523/j.issn.2095-6134.2002.5.010

Abstract ( 789 )

Aster jishouensis (Asteraceae), a new species from Hunan, China

LI Wei-Ping, LIU Sheng-Xiang

2002, 40 (5): 455-457. DOI: 10.7523/j.issn.2095-6134.2002.5.011

Abstract ( 795 )

Subularia L. (Cruciferae), a newly recorded aquatic genus of China

YU Dan, LI Zhong-Qiang, WANG Dong, XIA Sheng-Lin

2002, 40 (5): 458-459. DOI: 10.7523/j.issn.2095-6134.2002.5.012

Abstract ( 858 )

The genus Subularia L. (Cruciferae) and the species S. aquatica L. are reported as new records in China.

Corrigiola L. (Caryophyllaceae), a naturalized genus in China

WANG Yin-Zheng, LI An-Ren

2002, 40 (5): 460-461. DOI: 10.7523/j.issn.2095-6134.2002.5.013

Abstract ( 849 )

Corrigiola L. is reported as a newly recorded genus in China. C. littoralis L. has become naturalized in Lushan Mountain, Jiangxi Province, China.

Echinocystis Torr. et Gray (Cucurbitaceae), a naturalized genus in China

CHENG Shu-Zhi, CAO Zi-Yu

2002, 40 (5): 462-464. DOI: 10.7523/j.issn.2095-6134.2002.5.014

Abstract ( 879 )

Echinocystis Torr. et Gray of the Cucurbitaceae is reported as a naturalized genus in China.

The identity of a specific name of Epipactis

CHEN Sing-Chi, LUO Yi-Bo

2002, 40 (5): 465-469. DOI: 10.7523/j.issn.2095-6134.2002.5.015

Abstract ( 905 )

A morphological comparison is made between Epipactis consimilis D. Don, E. helleborine (L.) Crantz and E. veratrifolia Boiss. et Hohen. The true identity of Epipactis consimilis D. Don is discussed. As a result, Epipactis veratrifolia Boiss et Hohen., is recognized as a valid name to replace E. consimilis D. Don, a name formerly accepted by Rolfe and recently used in Flora Reipublicae Popularis Sinicae vol. 17.

A newly recorded species of Plantago　Linn. from China

LI Zhen-Yu, CHANG Yong-Tian, Ibraim ERSHIDI

2002, 40 (5): 470-472. DOI: 10.7523/j.issn.2095-6134.2002.5.016

Abstract ( 892 )

Plantago ovata Forsk. is reported as a naturalized species and a new record to China. It is described in detail.

Lectotypification of Aconitum wolongense W. T. Wang

LUO Yan, YANG Qin-Er

2002, 40 (5): 473-474. DOI: 10.7523/j.issn.2095-6134.2002.5.017

Abstract ( 827 )

Aconitum wolongense W. T. Wang, described from a mixed sheet, is lectotypfied.

Pleiosorbus is united with Sorbus (Rosaceae)

LU Ling-Ti, KU Ttsue-Chih

2002, 40 (5): 475-476. DOI: 10.7523/j.issn.2095-6134.2002.5.018

Abstract ( 927 )

The monotypic genus Pleiosorbus is reduced to the synonymy of Sorbus. The new name Sorbus medogensis is proposed.

A new synonym of Pellionia scabra Benth.

LIN Qi, DUAN Lin-Dong, LI Ming-Hong

2002, 40 (5): 477-479. DOI: 10.7523/j.issn.2095-6134.2002.5.019

Abstract ( 863 )

Based on the study of specimens from Hunan, and field observations in Hengshan (holo-

type locality of Pellionia cephaloidea W. T. Wang), Nanyue, Hunan, China, Pellionia cepha-

loidea W. T. Wang is regarded as a new synonym of Pellionia scabra Benth., and Pellionia Gaud-

ich. sect. Elatostematopsis W. T. Wang as a new synonym of Pellionia Gaudich. sect. Pellionia.

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