OF THE MATTO GROSSO EXPEDITION, 1891-92. 481 
pellucida, in sicco viridia, supra medium 6:0-7:5 cm. lat., facie superiore lepidibus 
minutis albis inspersa, lepide nervosa. Folia floralia, bracteole, et sepala deorsum 
subtiliter maculata, illa circa 3:5 em. long., oblongo-spathulata, piloso-pubescentia. 
Bracteola vix 2*0 em. long., fere usque ad 0:3 em. bifida. Calyx 2:2 cm. long., ad 
1:3 em. bifissus, segmento majore ad 0:3 em. bifido. Petala 5:0 em. long., lanceolata. 
Labellum 7:0 cm. long., circa 4°0 cm. diam., superne gradatim laxatum, luteum. 
Stamen 27 em. long., tenuissimum, nervosum. Antherz lineares, circa 0:5 em. long. ; 
loculi basi divergentes, superne attenuati ibique in cristam elevatam abeuntes. 
Ab affini Costo pumilo, Petersen, abhorret, przeter alia, foliis pellucidis, majoribus, 
diversiformibus, fere glabris nec hirsutis, in sieco viridibus nec subrubescentibus, 
labelloque minore gradatim nec subito in tubum attenuato. (Bras. Or. vel Goyaz.] 
C. pumilus was described by Petersen from specimens without flowers. There are 
flowers at Kew, carefully preserved by Burchell, hitherto the only collector of the plant, 
but the material is scarcely enough to warrant dissection. Nevertheless I feel satisfied 
from careful examination of the dried flowers that Burchell’s plant, although un- 
doubtedly closely allied to mine, has somewhat different flowers, to say nothing of the 
leaves. Unless I am mistaken, there is but one other acaulescent Costus in our herbaria, 
and that is an African one at Kew. 
Burchell’s specimens were gathered between the river Paranahiba and Goyaz. The 
former being in the provinee of Minas Geraes and thus in the South Brazilian botanical 
province, while the latter is in the North-Brazil—Guiana province, it is impossible to say 
of which province C. pumilus is a native. 
In the analysis of this Plate I have diligently sought to represent the flower correctly, 
the stamen alone costing several hours’ labour to dissect out. The task of making out 
with precision the delicate parts of such a flower is, however, such a diffieult one that 
the analysis may perhaps be defective, especially as regards the petal. 
Cosrus PUBESCENS (sp. nov.); caule leviter spirali, crasso, vaginis pubescentibus in 
ochream productis omnino obtecto; foliorum modicorum spiralium vaginatorum sub- 
sessilium lamina plerumque oblanceolato-oblongà, apice acuminata, dimidio inferiore 
eradatim attenuatà (nonnunquam minore, late ovata obtusa), pubescente, cito puberula 
vel glabra ; inflorescentiá in caule folioso terminali brevi nec ultra 5'0 cm. longa; 
bracteis laxis, subrectis, late ovatis obtusis, puberulis, inferioribus laminá frondosá 
magna hine gradatim imminuente coronatis; floribus inclusis (forsan vero subexsertis), 
ample bracteolatis ; calyce tubuloso, breviter ac pariter trifido ; stamine oblongo, haud 
petaloideo. 
—Hab. Juxta ripam fl. Paraguay, inter Santa Cruz et Villa Maria, flores przebuit mens. 
Dec. (N.813.) Grana de Macaco incolarum. | 
Orgyalis, sursum sepe ramosus. Caulis erectus circa 0'5 em. diam. Vaginze plerzeque 
2:0-40 cm. long., arcte applicate ; ochrez nunc brevissimz vel obsolete, nunc 
ad 0:3-0:4 cm. long., margine lanato-ciliatee. Foliorum lamina usque ad 16-0 cm. 
long., minime vero nec ultra 5:0-6:'0 cm. non absunt, plerumque 3:0-5:0 em. lat., 
membranacez, in sicco plus minus rubescentes. Bracteæ (lamina frondosa exempta) 
SECOND SERIES.— BOTANY, VOL. IV. 3g 
