851 
POLYSTACHYA puberula. 
Pubescent Polystachya. 
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GYNANDRIA MONANDRIA. 
Nat. ord. ORCHIDEZ. Div. IV. Epidendrex. Sect. 2. Ecalcarate v- 
ad maximum saccate. Poll. 4. Supra fol. 825. 
POLYSTACHYA, Hook. Perianthium rectum cuneatum clau- 
sum. Filum simplex nudum glandulà impositum. 
P. puberula, spica paniculata thyrsiformi, foliis lanceolatis 7-nervibus scapo 
longioribus, floribus ovariisque pubescentibus, bulbis ovatis. 
Bulbi epigei, ovati. Folia 6-12-uncialia, circa tria, lanceolata, paten- 
tia, T-nervia, glaberrima, scapo multo longiora. Scapus terminalis, teres, 
pubescens, superne ramosus, bracteis parvis, membranaceis, acuminatis sub 
axillis. Spica paniculata, thyrsiformis, undique cum floribus pubescens. 
Perianthium rectum, cuneatum, clausum, luteum, pubescens, ovario subequale. 
This undescribed species of Polystachya was received by 
the Horticultural Society, from Sierra Leone, in 1822. In 
generic character it perfectly agrees with the Dendrobium 
polystachyon of Swartz, upon which the genus Polystachya 
was founded by Dr. Hooker; but differs specifically in its 
leaves, which are very distinctly veined, and in its flowers, 
which are covered all over with a minute yellow pubescence, 
and disposed in a sort of thyrsoid branched spike. 
The following are the species at present known of this 
genus, which was divided by Dr. Hooker from Dendrobium 
with great propriety. 
1. Polystachya luteola. 
œ. occidentalis. Flores viridi-lutei. 
P.luteola. Hook. 
Dendrobium polystachyon. Lindl. 
8. mauritiana. Flores luteo-purpurei. 
Dend. polystachyon. Pet. Th. Orch. afr. t. 85. 
Hab. « in Índia occidentali, v. v.; Bin Mauritio, v. 8. sp, 
2. Polystachya puberula. Tab. nostr. 
Hab. in Sierra Leone, v. v. 
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