290 ORCHIDEZ. 
2. Trigonidium seemannii, Rchb. f. in Seem. Bot. Voy. ‘ Herald,’ p. 214; 
Walp. Ann. vi. p. 503. 
Panama (Seemann, 380). 
79. TRIZEUXIS. 
Trizeuxis, Lindl. Collect. Bot. t. 2; Benth. et Hook. Gen. Plant. iii. p. 566. 
A monotype. 
1. Trizeuxis falcata, Lindl. Collect. Bot. t. 2, et Gen. & Sp. Orch. Pl. p. 140; 
Hook. Exot. Fl. t. 126; Rchb. f. Beitr. Orch. Centr.-Am. p. 48. 
Costa Rica, Cartago (Girsted).—CoLoMBIA; VENEZUELA; BraziL; TRINIDAD. 
80. IONOPSIS. 
Ionopsis, H. B. K. Nov. Gen. et Sp. i. p, 348, t. 83; Benth. et Hook. Gen. Plant. iii. p. 567. 
An exclusively Tropical-American genus, spread from Mexico and the West Indies to 
Brazil. About ten species have been defined. 
1. Ionopsis brevifolia, A. Rich. et Gal. in Ann. Sc. Nat. série 3, iii. p. 26; 
Lindl. Fol. Orch. n. 4; Walp. Ann. vi. p. 684. 
Mexico (Galeotti). 
2. Ionopsis utricularioides, Lindl. Collect. Bot. t. 39, et Gen. & Sp. Orch. Pl. 
p. 194; Walp. Ann. vi. p. 684; Rchb. f. Beitr. Orch. Centr.-Am. p. 72. 
Epidendrum utricularioides, Swartz, Prodr. Fl. Ind. Occ. p. 122. 
Dendrobium utricularioides, Swartz, Fl. Ind. Occ. p. 1531. 
Tonopsis tenera, Lindl. Bot. Reg. t. 1904, Fol. Orch. n. 6 (varietates). 
Tonopsis zonalis, Lindl. in Lindl. & Paxt. Fl. Gard. ii. p. 13, fig. 14. 
SoutH Mexico, Sochiapam, on the frontiers of Vera Cruz and Oaxaca (Hartweg) ; 
GUATEMALA, Oratoria (Wendland).—Southward to Peru and Brazit, and in the Wzsr 
Inpizs. Hb. Kew. 
81. CRYPTARRHENA. 
Cryptarrhena, R. Br. in Bot. Reg. t.153; Benth. et Hook. Gen. Plant. iii. p. 568. 
Besides the following species there is one in Guiana. 
1. Cryptarrhena pallidiflora, Rchb. f. in Bot. Zeit. 1852, p. 766, et Walp. 
Ann. vi. p. 698. 
Orchidofunkia pallidiflora, A. Rich. et Gal. in Ann. Sci. Nat. série 3, iii. p. 24. 
Clynhymenia pallidiflora, A. Rich. et Gal. in Compt. Rend. Acad. Sc. Par. 1844, 
South Mexico, Oaxaca (Galeotti, 5298).—Jamaica; TrinipaD; Guiana. Hb. Kew. 
Bentham and Hooker, Joc. cit., suggest that this is the same as the type of the 
genus, C. lunata, R. Br. 
