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APOSTASIACEH OF THE MALAY PENINSULA. 387 
damp rocks ; but it sometimes grows on slender trees, covering 
them with a mat of stems. It comparatively seldom flowers. 
The flowers are white. 
APPENDICULA, Blume. 
The variation in the form of the number and form of the 
pollinia in this genus is very striking. Some species, e.g. 
A. pendula, Blume, have eight very unequal pollinia, connate at 
a point near the base, with a very short pedicel. A. callosa, 
Blume, has also eight; but they are nearly equal, slender, and 
quite free to the disc. A. refleza, Blume, has six, with hardly 
any pedicel, z.e., they are free on the disc nearly to the base. 
A. bifaria, Lindl., again has eight, two of which are rudi- 
mentary ; grouped in two bundles, on one fairly long pedicel. 
A muricata, Teysm. and Binn., has but four, seated on a very 
long pedicel, slender at the base and widening upwards into a 
spoon-like termination. Podochilus unciferus, Hook. f., has a 
similar arrangement, except that there are six pollinia, with 
two spoon-shaped pedicels, each of which bears three pollinia. 
The form of the anther-cap and rostellum vary correspondingly ; 
being short and broad in the forms with short pollinia and no 
pedicel, and longer in the others. It becomes indeed not easy 
to separate the two genera, Podochilus and Appendicula, The 
former appears generally to have a rudiment at least of the 
third pair of pollinia, and does not always have the pedicel 
split to the disc. Usually it has the reflexed lamina-like callus, 
at the base of the lip; and this may perhaps be taken as its 
best characteristic. But both genera require much study from 
living specimens before they can be satisfactorily classified. 
A. sirarta, Lindl. in Hook., Kew Journ., vii. (1855) p. 39. 
Hab. Singapore: Sungei Morai! Kranji! Bukit Timah! 
Malacca: Lower woods of Gunong Mering, Ophir 
Ranges ! 
Pahang: River Tahan! 
Selangor: Kwala Lumpur, Kelsall, Bukit Hitam! 
Penang: Government Hill! 
Kedah: Gunong Raya, 2,500 feet alt., Curtis ! 
Perak : Scortechini. 
Also Rhio ! and Borneo ! 
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