HASAN, 
UNIVERS: | 
LIBRARY 
FEB 1 1945 
A 
ren 
BOTANICAL LEAFLETS 
HARVARD UNIVERSITY 
CampripGr, Massacnusetrs, Fresruary 1, 1945 Voit. 11, No. 9 
AFRICAN ORCHIDS. XV 
BY 
V.S. SUMMERHAYES 
(Royal Botanic Gardens, Kew) 
THIS PAPER CONTAINS the descriptions of a number of 
new species of Microcoelia and Angraecopsis, two new 
combinations and some new records. The type specimens 
of the new species are all in the Kew Herbarium. 
Nervilia petraea (4fzelius ex Persoon) Summer- 
hayes comb. nov. 
Arethusa petraea Afzelius ex Swartz in Kong. Vetens. 
Acad. Handl. Stockh. 21 (1800) 280, nomen tantum 
— Afzelius ex Persoon Synops. Pl. 2 (1807) 512, descr. 
Pogonia Thouarsii Rolfe in Dyer Fl. Trop. Afr. 7 
(1897) 187, non Blume. 
Nervilia Afzeli Schlechter in Engl. Bot. Jahrb. 45 
(1911) 402—Summerhayes in Hutchinson & Dalziel 
Fl. West Trop. Afr. 2 (1936) 420. 
From Persoon’s description it is evident that he was 
dealing with the same plant as that referred to Pogonia 
Thouarsu Bl. by Rolfe and later separated by Schlechter 
as Nervilia Afzelii. In each case the specimen collected 
by Afzelius in Sierra Leone is the only one cited. N. 
petraea is the only African species with hair-like out- 
growths on the apical part of the lip, which is also some- 
what lacerate in front. It has since been found in other 
parts of West Africa and in Uganda. 
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