t. 5, with one- or two-leaved pseudobulbs, and white? 
flowers; it isa native of tropical America. 5. A. Oliveriana, 
Reichb. f. in Gard. Chron. 1878, vol. i. p. 558, from Brazil, 
with pseudobulbs and blue flowers. 6. A. Kelneriana, 
Benth. in Gen. Pl. vol. i. p. 544, which is the type of 
Reichenbach’s genus Koellensteinia, figured in his ‘* Xenia 
Orchidacea,” t. 24. 7. A. cyanea (Warrea cyanea*, Lindl. 
Bot Reg. 1844, Mise. No. 3; 1845, t. 28, Zygopetalum 
tricolor, Lindl. I. c. 1846, sub t. 64), a native of New 
Grenada, with the tufted leaves of A. graminea, no pseudo- 
bulbs, white sepals and petals, and blue lip. 8. A. graminea, 
Benth. 1. ¢. (Koellensteinia graminea, Reichb. f. in Bon- 
plandia, vol. iv. p. 323 (1856); Hook. Bot. Mag. t. 6338 ; 
_ Walp. Ann. vol. vi. p. 552; Maxillaria graminea, Lindl. 
Bot. Reg. 1836, sub t. (1802); Promenwa graminea, 
Lindl, l. c. 1848, Mise. 18), a Demeraran species with a 
tufted habit, no pseudobulbs, tufted leaves, and small 
yellow flowers. 9. A. venusta, Rolfe in Herb. Kew 
(Zygopetalum venustum, Ridley in Trans. Linn. Soc. Ser. 
u, Bot. vol. ii. p. 283), from Demerara.—The A. cyanea, 
Reichb. f. in Nov. Act. Nat. Cur. xxxv. pt. ii. (1876) p. 18, 
t. 4, is Acacallis cyanea, Lindl. Fol. Orchid., a closely allied 
but much larger flowered genus. 
A. ionoptera is a native of Peru, where it was found by 
the collector Wallis, who sent it to Linden, from whom the 
plant here figured was obtained at the International 
Horticultural Exhibition of Brussels in 1891. It flowered 
in the Royal Gardens in June, 1892.—J. D. H. 
_Fig. 1, Lip and column; 2, side view of the same; 3, dorsal and ventral 
view of anther; 4 and 5, pollinia :—adl enlarged. 
* W. carnea, by misprint, in Gen. Plant. vol. iii. p. 544. 
