Monday, February 3, 2025

[Botany • 2021] Petrocosmea villosa (Gesneriaceae) • A New Species from Shan State, Myanmar


Petrocosmea villosa D.J.Middleton, 

in Middleton, Shin et Baba, 2021. 

ABSTRACT 
The new species Petrocosmea villosa D.J.Middleton from Shan State, Myanmar is described. It is most similar to Petrocosmea kerrii Craib, P. crinita (W.T.Wang) Z.J.Qiu and P. heterophylla B.L.Burtt in Petrocosmea sect. Deinanthera but differs particularly in inflorescence structure, inflorescence indumentum and in the long calyx lobes. 

Keywords. Petrocosmea crinita, Petrocosmea heterophylla, Petrocosmea kerrii, Petrocosmea sect. Deinanthera, Shan State

Petrocosmea villosa D.J.Middleton.
 A. Flower front view. B. Flower side view.
(Photo: S. Ruchisansakun)

Petrocosmea villosa D.J.Middleton, sp. nov. 

Similar to Petrocosmea kerrii and P. crinita (W.T.Wang) Z.J.Qiu in the shape and colour of the corolla but differs from both in having both sessile and petiolate leaves (petiolate only in P. kerrii and P. crinita), longer calyx lobes (11–12 mm long in P. villosa, 1.5–4 mm long in P. kerrii and P. crinita) and more flowers ...

Etymology. The specific epithet refers to the dense hair covering on the inflorescence.


David John Middleton, Thant Shin and Y. Baba. 2021. A New Species of Petrocosmea (Gesneriaceae) from Myanmar. Gardens’ Bulletin Singapore. 73(2); 457-460. DOI: doi.org/10.26492/gbs73(2).2021-14