swollen than in HZ. praestans and H. splendens Rendle, 
while the staminodes are quite sessile. There are other 
differences in the petals and the lip, the middle lobe of 
which in HZ. macrantha has a marked longitudinal keel 
which is absent from both the species mentioned above. 
There are in the Kew Herbarium three more recently 
gathered specimens of H.macrantha, one from Mt. Elgon 
in Uganda, the other two from the Aberdare Mts. in 
Kenya Colony. 
Habenaria ($.Multipartitae) cavatibrachia Swm- 
merhayes sp. nov.; aftinis H. tricrurit A. Richard, a qua 
floribus duplo majoribus, calcari plus quam quintuplo 
longiore, rostelli lobis lateralibus apice adscendentibus 
incrassatis cavatis differt. 
Herba terrestris, fere omnino glabra, 30-60 cm. alta; 
tubera non visa. Caulis erectus, teres, basi usque ad 7 
mm. diametro, 5—8-foliatus. Folia 1-2 infima ad vaginas 
redacta, cetera lanceolata vel elliptico-lanceolata, breviter 
acuminata, basi breviter vaginantia, 6-14 cm. longa, 
1.7—8.5 cm. lata, sursum sensim decrescentia. Facemus 
rectus, 5-15 cm. longus, 5-10 cm. diametro, usque ad 
10-florus ; bracteae foliaceae, elliptico-vel oblongo-lanceo- 
latae, acuminatae, usque ad 5 cm. longae, inferiores flores 
fere aequantes. Flores adscendentes vel erecto-patentes, 
virides; pedicellus circiter 1 em. longus; ovarium 2—2.5 
cm. longum. Sepa/um intermedium erectum, ellipticum 
vel elliptico-ovatum, apice + rotundatum et mucronatum, 
concavum, 1.3-2 cm. longum, 1.1—1.4¢m. latum; sepala 
lateralia patentia, oblique anguste vel semi-ovata, suba- 
cuta, 1.8-2.5 cm. longa, 8.5-10.5 mm. lata; omnia sepala 
distincte trinervia, venis transversis numerosis. Petala 
libera, erecta, curvatim oblongo-elliptica vel anguste 
oblongo-ovata, obtusa vel subacuta, basi margine antica 
rotundato-cordata, 1.2-1.7 em. longa, 6.5-8 mm. lata, 
[ 273 ] 
