> 3) 
APOSTASIACEH OF THE MALAY PENINSULA. 375 
Labellum 3-4-lobum ; lobi laterales majusculi, medius integer 
vel bilobus; calcar pendulum; calli 0. Columna elongata; 
pes longus, porrectus, cum columna squilongus vel paullo 
brevior. Clinandrii margo posticus elevatus. Rostellum 
elongatum, acutum. Capsula elongata, cylindrica. 
Species 2. A. nirtuLus, Ridl. Sarcochilus hirtulus, Hook. f. 
A. SIAMENSIS, sp. nov. 
This genus has the habit of some of the Sarcochili ; but it is 
distinct from any of the allied genera in the long column, with 
a long foot at right angles to the body of the column, on the 
end of which is borne a lip with two large erect lateral lobes, 
and an entire or bilobed terminal lobe. The inequality of the 
size and form of the sepals is unusual in the whole group. The 
raceme develops rapidly as in Saccolabium, &e., and does not 
continue to grow after the flowers have begun to open, as in 
Thriespermum. 
A. HIRTULUS, Ridl. Sarcochilus hirtulus, Hook. f., Fl. Brit. 
Ind., vi. p. 89, et Ic. Pl., t. 2121. 
Hab. Pahang: Tahan River, Kota Glanggi, Limestone 
rocks ! 
Perak : Scortechini. 
Malacca: Maingay. 
The flowers are cream colour with pink spots, pretty though 
small. I found this little plant very abundant on the limestone 
rocks at Kota Glanggi. 
I have no doubt as to the correctness of my identification with 
the species described and figured by Sir Joseph Hooker; but I 
find the following differences:—The lateral sepals are much 
broader than the posticous one and distinctly keeled, and are 
adnate to the very long column foot. The petals are more 
linear. The foot of the column is remarkably long and slender, 
and stands at right angles to the body of the column. On the 
extreme end is borne the lip, the terminal lobes of which are 
distinctly broader than the lateral ones. 
A. stamensis, Ridl., sp. nova. Caulis 1 poll. longus ; 
radices copiose, tenues. Folia 5 poll. longa, vix 3 poll. 
lata, lorata, falcata, in sicco striata, apice inequaliter biloba 
subacuta. Racemi 3 poll. longi, plures, graciles, muriculati, 
basi longe nudi. Bractee minute, ovate; pedicelli § poll. 
