OBCHIDS OF MADAGASCAB. 481 



Comoro Isles, Johanna, HiUebrandt no. 1704!; and Mahe, 

 Seychelles, Boivinl in Herb. Brit. Mus. 



This is the largest plant of the section ; the leaves are moro 

 than 2 feet long and 3 inches across, the raceme is more 

 than 2 feet in height, and bears a number of flowers as large 

 as those of A. superbum, from which plant it is distinguished by 

 its wider leaves and smaller bracts, lanceolate and acuminate 

 and acute petals and sepals, and much longer and more slender, 

 slightly curved spur. The petals and sepals are green, 2 inches 

 in length by 2 lines across. The lip is white, and has a rhomb- 

 shaped ridge running down the centre as in superbum, but rather 

 more prolonged, ending in a raised line. The capsule is elongate, 

 subcylindrical, 1| inch in length and | inch in diameter in the 

 only specimen which I have seen, which is, however, not quite 

 ripe. The bracts are ovate, short, rather blunt, | inch in height. 

 The column is green. 



The following six species, together with A. caudatum, form a 

 well-marked group, characterized by the long terete, not folia- 

 ceous rostellum, the larger semiterete column, and the usually 

 ovate cuneate leaves. 



Angb^icum citbatitm, TJiouars, Orch. lies Afriq. t. 61 ; Hooker, 

 in Bot. Mag. t. 5624. 



This plant appears to be common in Madagascar, whence it 

 was introduced into cultivation by Messrs. Veitch. 



It has been collected at Ankafana "very common" (Deans 

 Cowan, and Hildebrandt no. 3987) ; Imarina (Deans Cowan, and 

 Baron no. 201); between Tamatave and Antananarivo (Meller 

 in Herb. Kew) ; and there are specimens collected by Du Petit 

 Thouars and Thompson in Herb. Brit. Mus., and by Langley 

 Kitching, and Parker in Herb. Kew, without specific localities. 

 It does not appear to have been met with in any of the other 

 islands. The stem is short, and the leaves vary from lanceolate 

 to obcuneate, entire at the tip, 3| inches long by 1| across in 

 dried specimens. There is usually, in the wild plant at least, only 

 one raceme to the plant ; but in a specimen collected by Thompson 

 in the British-Museum Herbarium there are no less than 5, one 

 of which attains a length of 11 inches ; they bear about 18 

 flowers, sometimes much less, and sometimes as many as 27, rather 

 crowded together. The flowers are about 1 inch across, white or 

 greenish white ; I have never seen them yellow as figured by 



