618 



Leguminosae 



Lathyrus 



Miles 



var. 



50 



Map 1272 

 L"athyrus venosus 

 intonsus Butters & St. John 



Stems winged, generally (excluding the wings) 1.5-3 mm in diameter below 

 the lowest peduncle; leaflets 2.5-8 cm long, linear to lanceolate; flowers 

 2-5 (8), 1.5-2 cm long. 



Leaflets 7-23 mm wide, 2-3.5 times as long as wide 4. L. palustris. 



Leaflets mostly 3-9 mm wide, more than 3.5 times as long as wide 



4a. L. palustris var. linearifolius. 



Stems wingless, generally 0.7-1.5 mm in diameter below the lowest peduncle; 

 flowers 3-9, 1-1.5 cm long; leaflets ovate, elliptic, or broadly lanceolate, 



2-4 cm long and 6-20 mm wide 4b. L. palustris var. myrtifolius. 



Leaflets 2. (See excluded species no. 407, p. 1068.) L. latifolius. 



1. Lathyrus ochroleucus Hook. CREAMCOLOR Pea. Map 1269. Infre- 

 quent to rare in dry soil in black and white oak woods in the northern 

 counties. 



W. Que. to Sask., southw. to n. Pa., the Great Lakes, Mo., Wyo., and B. C. 



2. Lathyrus japonicus Willd. var. glaber (Ser.) Fern. (Rhodora 34: 

 181. 1932.) Beach Pea. Map 1270. Infrequent on the beach of Lake 

 Michigan and rather common in the Keiser Blowout in Porter County. 

 It is fast becoming extinct on account of the building along the lake front. 

 It was reported in 1889 from the shore of Bass Lake, Starke County, by 

 Thompson. 



Newf ., Que., Minn., Man., B. C, southw. to N. J., Ohio, n. 111. to Calif. ; 



also in n. Eu. and Japan. 



3. Lathyrus venosus Muhl. Smooth Veiny Pea. Map 1271. There is 

 a colony of what I think is this species in the talus of a west slope 

 of the cliff along Blue River about half a mile north of Whitecloud, Harri- 

 son County. It has been reported from four of the northern counties but 

 I am referring these reports to the variety. 



Del., Md., and Pa. according to Butters & St. John. No doubt the range 

 is greater than that given by these authors. 



3a. Lathyrus venosus var. intonsus Butters & St. John. (Rhodora 19 : 

 158-159. 1917.) (Lathyrus venosus in part, of Gray, Man., ed. 7 and Brit- 



