POLYGONACEZ. 35 
12. Polygonum segetum, H.B. K. Nov. Gen. et Sp. ii. p. 177; DC. Prodr. 
xiv. p. 120 (varietates). ' 
Sout Mexico, Zacatecas (Hartweg, 105), near Vera Cruz (Galeotti, 451), without 
locality (Zinden).—Cotomsia. Hb. Kew. 
13. Polygonum tenue, Michx. Fl. Bor.-Am. i. p. 238; DC. Prodr. xiv. p. 100. 
Canapa to New Mexico.—Norru Mexico, within the old boundary at Santa Rita del 
Cobre (Wright, 1776). Hb. Kew. 
4, RUMEX. 
Rumex, Linn. Gen. Plant. n. 451; Benth. et Hook. Gen. Plant. ii. p. 100. . 
Herbs or rarely shrubs. About 130 species have been enumerated; but some 
authors estimate the number at less than 100. They are generally dispersed in north 
temperate regions, and rarer within the tropics and in the southern hemisphere. A 
few species are almost cosmopolitan weeds of cultivation. Most of the Mexican 
specimens in Kew herbarium have not been determined. All together they represent 
about six species. 
1. Rumex berlandieri, Meissn. in DC. Prodr. xiv. p. 45. 
Lovistana.—Mexico, Matamoros and around Tampico (Berlandier).—Caut. 
2. Rumex brevipes, Meissn. in DO. Prodr. xiv. p. 55. 
Sourn Mexico, between Tampico and Real del Monte (Berlandier, 243 ; Ehrenberg, 40). 
3. Rumex chrysocarpus, Moris. Enum. Sem. Fl. Taurin. 1831; DC. Prodr. 
xiv. p. 46. 
Mexico ?; Cui? 
4, Rumex crispus, Linn., var. mexicanus, Mart. et Gal. in Bull. Acad. Brux. x. 
(reprint, p. 13). | 
South Mexico, Misteca Alta and Yavezia, near Oaxaca, at 6000 to 7000 feet 
(Galeotti, 476). 
[Rumex kunthianus, Schult. f. Syst. Nat. vii. p. 1423; DC. Prodr. xiv. p. 45; 
_R. longifolius, H. B. K. Nov. Gen. et Sp. ii. p. 180, incorrectly recorded as Mexican. ] 
5. Rumex maritimus, Linn.? DC. Prodr. xiv. p. 59. 
Sour Mexico, Chapultepec (Schaffner, 1), near Mexico (Bourgeau, 200). Hb. Kew. 
6. Rumex mexicanus, Meissn. in DC. Prodr. xiv. p. 45. 
SoutH Mzxico, around Leon (Mendez), without locality (Schiede, 90; Ehrenberg). 
5. MUEHLENBECKTIA. 
Muehlenbeckia, Meissn. Gen. Plant. p. 316; Benth. et Hook. Gen. Plant. iii. p. 101.’ 
Shrubs or half-shrubs inhabiting Australia, New Zealand, the Pacific Islands, and 
America, from Mexico through the Andes to extratropical regions. About fifteen 
species are known. 
} /2 
