POLYGONACEA. | 338 
CotoraDo to New Mexico and Texas.—Norta Mexico, Parras, Coahuila (Palmer, 
1173). Hb. Kew. 
B. ramosissimum, Benth. in DC. Prodr. xiv. p. 20. 
Texas.—Nortu Mexico, Soledad, twenty-five miles south-west of Monclova (Palmer, 
1174). Hb. Kew. 
16. Eriogonum thomasii, Torr. in Pacif. Railr. Rep. iv. p. 364; Torr. et Gr. 
in Proc. Am. Acad. viii. p. 184. 
CaLirornia; ARrizona.—NortH Mexico, within the old boundary at Camp Grant 
(Palmer). 
17. Eriogonum undulatum, Benth. in DC. Prodr. xiv. p. 7; Proc. Am. Acad. 
vill. p. 155, et xii. p. 255. 
SoutH Mexico, Real del Monte, at 8000 feet (Galeotti, 3111). Hb. Kew. 
18. Eriogonum wrightii, Torr., ex Benth. in DC. Prodr. xiv. p. 15; Proc. Am. 
Acad. vill. p. 176, et xii. p. 266. 
Cattrornia to New Mexico.—Nortu Mexico, Sonora (Thurber), Camp Grant (Roth- 
rock), region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer,796). Hb. Kew. 
' 19. Eriogonum, sp. n. ? 
NortH Mexico, Sierra Madre (Palmer, 1175). Hb. Kew. 
2. CHORIZANTHE. 
Chorizanthe, R. Br.; Benth. in Trans. Linn. Soe. xvii. p. 146, t. 19; Benth. et Hook. Gen. Plant. 
lll. p. 93. 
About thirty species, of which eight are Chilian, and the rest Californian. All the 
Californian species are annual herbs; with one exception the Chilian species are 
perennial herbs or half-shrubs. 
1. Chorizanthe brevicornu, Torr. Bot. U.S. & Mex. Bound. Surv. p. 177. 
Nevapa and Co.Lorapo to Arizona and Ca.irornta.—NortH Mexico, on the Gila 
(Parry). 
3. POLYGONUM. 
Polygonum, Linn. Gen. Plant. n. 495 ; Benth. et Hook. Gen. Plant. iii. p. 97. 
This genus is dispersed nearly all over the world ; and some of the species are almost 
cosmopolitan. ‘There are about 150 distinct species, mostly herbaceous. 
1. Polygonum acre, H. B. K. Nov. Gen. et Sp. ii. p. 179; DC. Prodr. xiv. 
p. 108 (varietates); Griseb. Fl. Brit. W. Ind. p. 161; Fl. Bras. xiv. t. 5. 
PennsyLvania to Texas.—Mexico (Miller, 568; Botteri, 813; Bourgeau, 2658) ; 
GUATEMALA (Bernoulli, 134); Panama (Fendler)—And southward to BuEnos AYRES, 
as well as in the West Inpizs. Hb. Kew. 
2. Polygonum acuminatum, H. B. K. Nov. Gen. et Sp. ii. p. 178; DC. Prodr. 
xiv. p. 114 (varietates) ; Griseb. Fl, Brit. W. Ind. p. 161; Mart. Fl. Bras. xiv. t. 4. 
BIOL. CENTR.-AMER., Bot. Vol. III., October 1882. f 
