On Paphiopedilum malipoense sp. nov.—An Intermediate Form Between Paphiopedilum and Cypripedium, with a Discussion on the Origin of the genus

Abstract

Abstract:

Paphiopedilum malipoense S. C. Chen et Tsi is a very interesting new species with its flower similar to that of Cypripedium, especially section Cypripedium. It belongs

to subgenus Brachypetalum, the most primitive group of Paphiopedilum, but differs from

its allied species in hgniva elliptic-lanceolate sepal with cuspidately acuminate apex, rather

narrow petals and horizontal lip, which are of common occurrence in many cypripediums, but

very rare in paphiopedilums. Apparently, this is an intermediate form, or a link, between

Paphiopedilum and Cypripedium, but it does not seem to arise from hybridization between

them, because no Cypripedium has been found wherever Paphiopedilum occurs.

The new species is distributed in southeastern Yunnan of China. In this area, as well

as in river valleys of western Yunnan or the Hengduan Mountains, there have been four

species of the same genus reported before. As we know, the Hengduan Mountains and their

adjacent areas are rich in Cypripedium. The differentiation of the genus there is remarka-

ble. All five sections it contains occur there and three of them are quite distinctive. For

example, the general appearance of the section Bracleosa is dissimilar to that of any other

cypripediums, but closely resembles that of Listera. It appears that the difference between

sect. Bracteosa of Cypripedium and sect. Brachypetalum of Paphiopedilum is not neces-

sarily wider than that between sect. Bracteosa and sect. Cypripedium of the same genus.

Apparently, it is reasonable to consider Paphiopedilum to be an evolutional branch of Cy-

pripedium extending into tropical area, with its primitive group (subgenus Brachypetalum)

still remaining in its northern fringe area. This primitive subgenus has eight species, dis-

tributed from western Yunnan to the Malay Peninsula. Five of them, including the inter-

mediate and primitive form published here, are found in the hilly land of southeastern Yun-

nan and the river valleys of western Yunnan. All these facts suggest its area of origin: the

river valleys of the Hengduan Mountains and the lower hilly land contiguous to the south

of them.

Key words: Orchidaceae, Cypripediloideae, Cypripedium, Paphiopedilum, Subgen.Brachypetalum, Paphiopedilum malipoense, origin, Distribution

Chen Sing-Chi, Tsi Zhan-Huo. On Paphiopedilum malipoense sp. nov.—An Intermediate Form Between Paphiopedilum and Cypripedium, with a Discussion on the Origin of the genus[J]. .

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On Paphiopedilum malipoense sp. nov.—An Intermediate Form Between Paphiopedilum and Cypripedium, with a Discussion on the Origin of the genus

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