454 
than the rachis of its leaf, 4~6-flowered, slender; flowers purple, 
scarcely over 1.5 cm. long, clustered at the end of the peduncle; 
pedicels shorter than the calyx-tube; calyx teeth aeute, the three 
lower of about the same length, the upper pair much shorter and 
forming a sinus, all less than half the length of the tube. Legume 
not seen. 
An apparently distinct species, although we have seen but one 
specimen. . 
-, Sierra Pedro Nolasco, Talea,etc. Mexico. C. Jurgensen (n.817). 
Type in Herb. Col. Coll.; communicated by Lindley. 
22. LATHYRUS GRAMINIFOLIUS (S. Wats.) White. 
Orobus dissitifolius Alefeld, Bonplandia, 9: 145 (1861), excl. 
syn. not L. dissttifolius Nutt. A 
Lathyrus palustris var. angustifolius S. Wats. Biblio. Index, 1+ 
230 (1878), not L. angustifolius Martr. | 
Lathyrus palustris var. graminifolius S. Wats. Proc. Am. Acad. : 
23: 263 (1888). Pee 
Perennial, glabrous or sparingly pubescent throughout; ye: ‘4 
‘rather slender, quadrangular, or terete, wingless, scarcely rissa: 2 
branching, 15-60 cm. high; stipules minute, narrowly gua : 
tate, the lower lobe .very short, entire, 0.5-1. cm. long; lea i ay 
4-8, scattered, 4-12 cm. long, linear 2-3 mm. broad ; eae oo 
about the length of the leaves, 2-10-flowered ; flowers loosely OE 
mose, small, about 1 cm. long ; corolla purplish, white with pin a 
_ yellow vexillum, variable in size and shade of color; calyx- He 
subequal, much shorter than the tube, triangular-acuminate, re 
lower forming a large, rounded sinus; legume compressed, ie pare 
seeded. August. 
Mexico, New Mexico, Arizona, California. 
Original locality : Sonora, Mexico, Thurber (n. 1016). 
Authentic specimen in Herb. Col. Coll. 
23. Larnuyrus Arizonicus Britton; Trans. N. Y. Acad. Sci. =i 6 
(1889). : 
Lathyrus palustris L. var. 5, T. & G. FI. N. A.1: 276 (1838). 
Arizona, Colorado. : Pp. 
A form from the mountain region of Colorado, Vee 
Sangre de Christo Range, G. H. Hicks (n. 19); North si 
S. Sheldon (n. 104), has three pairs of leaflets, as well a5 
__ white flowers and is otherwise apparently closely related * | 
