LEGUMINOSZ. 293. 
This plant has a very wide range of distribution in temperate and warm regions in 
the northern hemisphere, including North America, though it may have been intro- 
duced into the locality given above. | 
44, LATHYRUS. 
Lathyrus, Linn. Gen. Plant. n. 872; Benth. et Hook. Gen. Plant. i. p. 526. 
About 100 herbaceous species, generally dispersed.in the temperate and subtropical 
regions of the northern hemisphere ; a few species are indigenous in South America. | 
1. Lathyrus mexicanus, Schl. in Linnea, xii. Litbl. p. 85. 
SoutH Mexico, valley of Mexico (Bourgeau, 85). Hb. Kew. | 
This is probably L. tingitanus, Linn., an Old-world species, now widely diffused 
as an escape from cultivation. 
2. Lathyrus palustris, Linn. Sp. Pl. p. 1034. 
Widely dispersed in Europe, Norta Asta, and NortH AMERICA. 
Var. ? foliis elongatis angustis etc. (Gray, Pl. Wright. ii. p. 32). 
Norte Mexico, Cohahuila and Sonora. 
3. Lathyrus polymorphus, Nutt. Gen. ii. p. 97. 
Missournr &c. southward.—NortH Mexico, in wet places, Sonora (Thurber), along 
the streams between the San Pedro and Santa Cruz, Sonora (Wright). 
4, Lathyrus venosus, Muhl. in Willd. Sp. Pl. iii. p. 1092; Torr. & Gr. Fl. N. 
Am. i. p. 2742 
- Nort Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 197) ; 
Sourn Mexico, without localities (Jurgensen, 817; Coulter). Hb. Kew. 
L. venosus is a very widely dispersed species in North America, from which the 
Mexican plant may be specifically different. 
Tribe PHASEOLEA. 
Upwards of fifty genera. A large proportion of the species are twining herbs; and 
very few.are trees. They are mostly natives of warm countries. 
45, CENTROSEMA. 
Centrosema, DC. Prody. ii. p. 284; Benth. et Hook. Gen. Plant i. p. 527. 
About twenty-five herbaceous or somewhat woody species, natives of South and 
Central America. One is also widely dispersed in North America, occurs in: West 
Tropical Africa, and is naturalized in Java. 
