Variation Patterns and Systematics of the Widespread Species Epilobium angustifolium L.(Onagraceae) in China

Variation Patterns and Systematics of the Widespread Species Epilobium angustifolium L.(Onagraceae) in China

1Chen Chia-Jui, 2Hoch Peter C., 2Raven Peter H.

1 (Institute of Botany, Academia Sinica, Beijing)
2 (Missouri Botanical Garden, St. Louis, Missouri, USA)

Received:1900-01-01 Revised:1900-01-01 Online:1988-04-18 Published:1988-04-18
Contact: Chen Chia-Jui

Abstract

Abstract:

Cytological, morphological, and geographical studies of Epilobium angustifolium

in China reveal two partly distinct, partly overlapping entities that are best treated as subspe-

cies. The diploid (n=18) subsp. angustifolium has smaller, triporate pollen grains, typically

glabrous stems and leaves, and smaller leaves and flowers, and occurs in colder, more northern

areas, and at higher elevations in overlap zones. The tetraploid (n=36) subsp. circumva-

gum has larger pollen with a mixture of quadriporate pollen grains, pubescent stems and

leaves, and larger leaves and flowers, and occurs in warmer parts of southern China and at

lower elevations. We report 11 chromosome counts, six diploid and five tetraploid, including

the first reported tetraploids in Asia.

Key words: China, Epilogium angustifolium, Complex, Variation patterns, Cytology, Syste-

Chen Chia-Jui, Hoch Peter C., Raven Peter H.. Variation Patterns and Systematics of the Widespread Species Epilobium angustifolium L.(Onagraceae) in China[J]. .

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Variation Patterns and Systematics of the Widespread Species Epilobium angustifolium L.(Onagraceae) in China

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