ORCHIDS OF MADAGASCAR. 491 



for their reception. The extensive development of roots, forming 

 in G. aphylla a dense mass, the absence of leaves at least during 

 the flowering season, the short stem, the minute flowers, are the 

 most important characteristics of the genus. Besides the species 

 here described, Angracumglobulosum,llochst.(Giissoniaglobulosa, 

 mihi) appears to belong to the genus. It is a native of Abyssinia, 

 and is remarkable for bearing a little bud-shaped cone of leaves 

 in the centre of the mass of roots. 



Epiphytse pusillae, aphylla? (sub anthesin), radicibus ssepius 

 copiosis, longis ; caule brevi ; floribus minutis, petalis sepalisque 

 ovatis obtusis ; calcare brevi obtuso quam pedicelli breviore ; 

 columna recta brevi ; anthera apiee producta acuta ; polliniorum 

 caudieula unica lineari, glandula parva, lobis rostelli Iinearibus 

 porrectis. 



Flores parvi, aurantiaei, calcar ferme semi- 



unciale, cylindricum G. Gilpince. 



Flores minutissimi, labellum ovatum obtusum, 

 calcar scrotiforme, racemus laxus 3- 



uncialis G. exilis. 



calcar clavatum, racemus brevis com- 



pactus G. aphylla. 



labellum trilobum, lobus medius linearis . . G. physophora. 



Gussonia GiLPiKiE, mihi. — Angra?cum G-ilpinae, S. Moore, 

 Journ. Linn. Soc. xvi. p. 206. 



G. radicibus longis validulis subteretibus ; caule brevi, semi- 

 unciali ; racemis l|-uncialibus plurifloris ; floribus fulvis parvis, 

 pedicelljs gracilibus rectis ; bracteis ovatis cucullatis obtusis 

 patentibus, inferioribus vaginantibus ; petalis sepalisque brevi- 

 bus ovatis obtusis, sepalis paullo majoribus et acutioribus ; ]abello 

 suba?quali ovato obtuso ; calcare recto crassiusculo tereti, quam 

 pedicelli parum breviore ; columna recta tenui ; anthera magna 

 ovata acuminata; polliniis parvulis, caudieula lineari, basi dilatata, 

 longa ; glandula parva oblonga ; rostelli lobis Iinearibus ascen- 

 dentibus porrectis. 



Antananarivo, Miss Gilpin ! ; Betsileo, Baron no. 199 ! Herb. 

 Kew ; Ankafana, Deans Cowan ! Herb. Brit. Mus. 



This plant is distinguished from the rest of the genus by its 

 larger orange-coloured flowers, with a straight thick spur nearly 

 i an inch in length. The stem is usually short, | an inch in length 

 at most, and emits numerous rather thick roots, sometimes 



