364 HYDROPHYLLACEZ. 
++ Folia basi attenuata, subsessilia vel vix petiolata, nec semiamplexicaulia nec secus caulem 
decurrentia ; pedunculi sepius brevissimi. 
{ Sepala sursum latiora. 
10. Nama dichotomum, Choisy in DC. Prodr. x. p. 182; A. Gr. in Proc. 
Am. Acad. v. p. 338, viii. p. 283. 
Hydrolea dichotoma, Ruiz et Pav. Fl. Peru. t. 244. 
Norn Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 610); 
SourH Mexico, Vera Cruz to Orizaba (Miller, 1678), Zimapan (Coulter, 916), valley of 
Mexico (Bourgeau, 356, 610), region of Orizaba (Bourgeau, 3163); GuaTeMaLa, Atitlan 
(Bernoulli, 614).—Ecuapor ; Bouivia. Hb. Kew. 
Var. angustifolium, A. Gr. in Proc. Am. Acad. viii. p. 284 ; Synop. Fl. N. Am. ii. 
p. 178. 
Cotorapo ; New Mexico.—Nortu Mexico (Palmer, 855), San Luis Potosi (Schaffner). 
Hb. Kew. 
11. Nama coulteri, A. Gr. in Proc. Am. Acad. viii. p. 283. 
Norra Mexico, Nazas valley, Bolson de Mapimi, Chihuahua (Gregg). 
Founded on Coulter’s 463 of the “ Californian collection,’ but probably from the 
northern part of Mexico. 
N. sandwicensis, A. Gr., is of this subdivision, and is related to the next. 
tt Sepala sursum haud ampliata. 
12. Nama hispidum, A. Gr. in Proc. Am. Acad. v. p. 339; Synop. Fl. N. 
Am. ii. p. 174. 
Texas to ARIZONA and CaLirornia.—NortH Mexico, San Lorenzo de Laguna (Palmer, 
859, 860). Hb. Kew. 
N. demissum, A. Gr., from Oregon to Arizona, belongs to this group. 
+++ Folia caulina sessilia, haud decurrentia, superiora basi sat lata plus minus semiamplexicaulia ; 
sepala sursum plus minus ampliata; pedunculi sepius brevissimi. 
13. Nama undulatum, H. B. K. Nov. Gen. et Sp. iii. p. 130; A. Gr. Synop. 
Fi. N. Amer. ii. p. 174. 
Nama echioides, Griseb. Symb. ad Fl. Argent. p. 277. 
Capsula oblonga ima basi calyci coadunata ; seminibus numerosissimis parvis ovalibus, testa tenui 
conformi diaphana. 
Norte Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 607, 
608); SourH Mexico, Cerro de los Bafios, valley of Mexico (Bourgeau, 131).—Cuiu ; 
La Puata. Hb. Kew. 
Var.? macranthum, Choisy, Hydrol. p. 18, t. 2. fig. 1; DC. Prodr. x. p. 182. 
Nama berlandieri, A. Gr. in Proc. Am. Acad. vill. p. 282, x. p. 330. 
Forma notabilis laxa; floribus majoribus interdum longiuscule pedicellatis. 
Norra Mexico, Tamaulipas near Reynosa (Berlandier, 2116, 699). Hb. Kew. 
