ACANTHACEAE. 505 
sticha); calyx lepidotus, latiusculus, fere ad basin 5-partitus, segmentis linearibus, acutis, 
2-3 lineas longis; corolla extus puberula, simul primum minutissime lepidota, tubuloso- 
infundibularis, fere recta, 23-3 poll. longa, tubo sursum usque ad medium gracili (14-2 lineas 
diametro), dein subito ampliato (usque ad 9 lineas diametro), limbi lobis 5, subequalibus, latis, 
rotundatis ; stamina 4 inclusa; discus crassus, pulvinatus; ovarium minute puberulum, loculis 
pauci (4 ?)-ovulatis; stylus undique pilosulus. Capsulam non vidi.—Dipteracanthns tubiflorus, 
Seem. Bot. Voy. ‘ Herald,’ p. 178, nec Nees. 
Panama, San Lorenzo, Veraguas (Seemann, 1162). Hb. Kew. 
Dr. Seemann referred his specimens to Dipteracanthus tubiflorus, Nees (Ruellia 
tubiflora, H. B. K.), which is described as having solitary, axillary flowers; and at 
the same time suggested that D. leucanthus, Nees, was the same species. We have 
the type of the latter before us; and it offers most striking differences in its large calyx 
and corolla. ) 
8. Ruellia geminiflora, H. B. K. Nov. Gen. et Sp. ii. p. 240; Griseb. Fl. 
Brit. W. Ind. p. 461. 
Dipteracanthus geminiflorus, Nees in Mart. Fl. Bras. fase. vii. p. 40, et DC. Prodr. xi. p. 136. 
Gymnacanthus geminiflorus, Hirst. in Vidensk. Meddel. 1854, p. 127. 
Mexico (Henke).—Southward to Peru and Brazit; Cupa and TRinipaD. 
9. Ruellia hirsuto-glandulosa, Hemsley. 
Dipteracanthus hirsuto-glandulosus, Girst. in Vidensk. Meddel. 1854, p. 123; Walp. Ann. v. p. 648. 
South Mextco, Hacienda de Buena Vista, Vera Cruz, and Tehuacan (Liebmann). 
Probably the same as R. rosea. 
10. Ruellia hookeriana, Hemsley. 
Dipteracanthus hookerianus, Nees in DC. Prodr. xi. p. 130. 
SoutH Mexico, Sierra San Pedro Nolasco &c. (Jurgensen, 598). Hb. Kew. 
11. Ruellia humifusa, Hemsley. 
Dipteracanthus humifusus, Girst. in Vidensk. Meddel. 1854, p. 125; Walp. Ann. v. p. 648. 
Sour Mexico, Vera Cruz (Liebmann). 
[Dipteracanthus humilis, Seem. Bot. Voy. ‘Herald,’ p. 178, is different from the 
Brazilian plant. | 
12. Ruellia? hygrophiloides, Hemsley. 
Dipteracanthus hygrophiloides, Nees in DC. Prodr. xi. p. 121. 
Mexico (Henke). 
13. Ruellia jussieuoides, Hemsley. 
Arrhostoxylon jussieuoides, Nees in DC, Prodr. xi. p. 212. 
South Mexico, Colipa, Vera Cruz (Ziebmann), Sierra San Pedro Nolasco &c. 
(Jurgensen, 942). Hb. Kew. 
14. Ruellia lactea, Cav. Ic. Pl. iii. p. 28, t. 255. 
Cryphiacanthus lacteus et C. macrosiphon, Nees in DC. Prodr. xi. p. 198. 
Norra Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 703); 
BIOL. CENTR.-AMER., Bot., Vol. II., Apri? 1882. Bt 
