ORCHIDS OF MADAGASCAR. 495 



ovatis conniventibus supra stigma horizontaliter porrectis, stig- 

 mate subrotundo excavato." 



Aeeawthtjs Arachkites, Lindley, Bot. Peg. sub t. 817 (Acran- 

 thes, lapsu) ; 8. Moore in Flor. Maurit. Sf Seych. p. 352.— Aeran- 

 thus Arachnitis, Hook. Bot. Mag. no. 6031. — A. grandiflorus, 

 Lindley, Orel. PI. p. 243, ex parte. — Dendrobium Arachnites, 

 Thouars, Orch. lies Afr. t. 88. 



Madagascar, low down on trees, Ankafana, Beans Cowan {icon.). 

 Mauritius, Bojer, Bouton, Ayres in Herb. Kew. Rodriguez, 

 Balfour f. (var. Balfouri), fide 8. Moore, I.e. 



The flowers are given as white in Thouars's figure, yellowish 

 green in that in the ' Botanical Magazine,' and dull bluish green 

 in Deans Cowan's figure. It is altogether a smaller plant than 

 A. grandiflorus, Lindl. 



iEoNIA. 



A small genus of about five species, all natives of the Mas- 

 carene Islands. 



iEoNiA macrostachta, Lindley, Gen. and Sp. Orch. PI. p. 245. 

 — Epidendrum macrostachys, Thouars, Orch. Pes Afr. t. 83. — 

 Beclardia macrostachya, Ach. Rich. Orch. Maur.\). 19, 1. 11. fig. 2. 

 ■ — Aerides macrostachyon, Spreng.Syst. Veget. p. 719 ; Boj. Hort. 

 Maur.-p. 313. — Aeranthusmacrostachys, Peichenbachfil. in Walp> 

 Ann. ri. p. 980 ; 8. Moore in Flor. Maur. et Seych. p. 352. 



Madagascar, Ankafana, Beans Cowan in Herb. Brit. Mus. ! 

 Mauritius, La Savanne, Bojer. Bourbon, Balfour in Herb. Kew. 



This plant has a rather stout stem covered with imbricated 

 linear oblong green leaves arranged distichously and slightly re- 

 curved, 5 or 6 inches in length by f inch in breadth, the apices 

 unequally bilobed. The roots are rather numerous, stout and 

 long. The racemes, one or two to a plant, are erect, about 9 

 inches high, with numerous large white sweet-scented flowers. 

 The lip is obovate and creuulate, the apex bilobed, with or with- 

 out a small cusp between the two lobes. The column is rather 

 short ; the lobes of the rostellum are linear acute and thrust for- 

 ward over the somewhat large stigma. The anther is helmet- 

 shaped with an acuminate peak in front : inside are two flaps 

 making it almost bilocular. The pollinia are circular in outline, 

 rather flat, and with a groove. There is but one gland, which is 

 ovate-acuminate, the broad apex being notched. Richard (/. r.) 



