Saromthus.1 cxlviii. orohide^. (J. D. Hooker.) 71 



ParisJiii, with even more remarkable poUinia. [The strap of the stipitate pollinia must 

 resemble that of Baccolah. sect. Uneifera, J. D. H.]. 



CIiEZSOSTOlUA, Blume. 



Differs from Sarcanthus only ia the spur not being septate, and from 

 Saccolabium in having a dorsal scale or callus within the spur beneath 

 the column. — Species (known) probably 15 or 20. 



Under Sarcanthus I have given my reason for not bringing that genus under this ; 

 to which I may add that if bcth were brought under Saccolabium, the result would be 

 perhaps more satisfactory still. There are no characters of habit or habitat whereby 

 the three can be distinguished, and the structural are very minute and often 

 obscure. In Cleisostoma and Sarcanihus the dorsal appendage within the spur is either 

 a 2-lobed callus or a thin scale, suggesting the propriety of rearranging the species of 

 both genera by this character, but it is one so difficult of accurate observation in 

 dried specimens that I hesitate to adopt it. 



* Stem more or less elongate. Peduncle stout, usually longer than the 

 leaves, branched, erect ; flowers in short spikes or racemes terminating the 

 brcmches, {as in Sarcanthus pallidua). 



1. C. latifolium, Lindl. in Sot. Beg. 1840, Misc. 6Q ; stem very 

 stout, leaves 2i-9 by 1^2 in., from oblong to lorate, peduncle very stout, 

 side lobes of lip short truncate, midlobe reniformly ovate caruncled 

 towards the base, spur saccate. Walp. Ann. Yi. S89. V. iviacum, Lindl. in 

 Joum. Sort. Soc. 1850, 80 ; Walp. I.e. 



Pekae, Wray, {Ic. Scortechini) ; SiNaApoEE and Malacca, Griffith. {Kew Dis- 

 trib. 9235), Maingay, (K.d. 1647). 



Stem 6-10 in., as thick as the middle finger. Leaves thickly coriaceous, flat, 

 obtusely broadly 2-lobed, base narrowed. Peduncle 12-18 in., rather flexuous j 

 sheaths annular ; branches 1-2 in. ; rachis of spikes very stout, bracts minute, 

 broad; flowers ^ in. diam. ; sepals and petals obovate-oblong, greenish mai;gined or 

 spotted with red-brown ; spur sometimes inflated below, dorsal scale truncate erose ; 

 column very short, rostellum inconspicuous ; anther low, broad, strap of globose 

 pollinia linear, gland small. Capsule 1 in., fusiform. — Of Lindley's C, latifolium 

 there is no specimen in his Herbarium. It was described from a Singapore plant 

 cultivated by Loddigcs, and agrees in characters with C. fuscum, of which Lindley 

 himself says it is probably only a form of latifolium. 



2. C. andamanicum, Hook. f. ; leaves 4-6 by J-f in. lorate, pe- 

 duncle equalling or exceeding the leaves, side lobes of lip short truncate, 

 midlobe very short reniform, spur cylindric. 



South Andaman Islands, Kurz. 



Stem as thick as a goose-quill. Leaves very coriaceous, recurved, obtusely un- 

 equally 2-lobed. Peduncle 5-7 in. ; sheaths annular and bracts and flowers as in 

 C. latifolium; flowers J in. diam., pale greenish-yellow with a purple band within the 

 margin ; lip yellow, spur spotted with red, dorsal callus retuse ; column very short, ros- 

 tellum large, prominent ; anther ovate, acuminate, strap of globose pollinia slender, 

 gland medium-sized. — Closely allied to latifoliimi, but much more slender, leaves 

 smaller and narrower and spur cylindric. 



3. C. maculOBUm, Lindl. Gen. Sf Sp. Orchid. 227 ; in Bat. Reg. 

 1840, Misc. 37; leaves 6-7 by f-f in. narrowly lorate, peduncle stout 

 shorter or about equalling the leaves, side lobes of lip short truncate, mid- 

 lobe very short ovate papillose, spur saccatel Walp. Ann. vi. 888. C. ga- 

 leatum, Thwaites Enum. 305. Saccolabium galeatum, Gardn. mss. 



