1G0 LEGUMINOS.E. Lathyrus. 



* ■* Rhachis of the leaves not tendril-bearing or rarely so : piod shortly stipitate. 

 +- Peduncles long, 2 - 6-flowered. 



7. L. littoralis, Endlicher. Densely silky-villous throughout : stems numerous 

 from creeping rootstocks, stout, decumbent or ascending, \ to 2 feet long : stipules 

 ovate-oblong, acute, entire, half an inch long ; leaflets 1 to 3 pairs, with a small 

 linear or oblong terminal one, cuneate-oblong, 4 to 6 lines long : calyx-teeth nearly 

 equal, as long as the tube : standard bright purple, 6 to 8 lines long, exceeding the 

 paler wings and keel : style flattened most of its length : pod oblong, villous, an 

 inch long, 3-5-seeded: seed nearly 3 lines broad. — Gen. PL 1279. Astrophia 

 littoralis, JSTutt. in Torr. & Gray, EL i. 278. Orobus littoralis, Gray, Pacif. E. 

 Eep. xii. 58, t. 6 ; Torrey, Pot. Wilkes Exp. 268. 



On the coast near Sau Francisco {Andrews) : more frequent from the month of the Columbia 

 River northward. This and the following species are the American representatives of the Linnean 

 genus Orobus, chiefly of the Old World, now generally made a section of Lathyrus, 



8. L. Nevadensis, "Watson, 1. c. Slender and usually low, finely pubescent or 

 nearly glabrous : stipules narrowly acuminate ; leaflets 2 to 4 pairs, thin, ovate 

 to ovate-oblong, an inch or two long, obtuse or acute : flowers large, 7 to 12 lines 

 long, ochroleucous (?) : calyx-teeth shorter than the tube : fruit unknown, perhaps 

 sessile. — L. venosus, var. obovatus, Torrey, Pacif. E. Eep. iv. 77. 



In the Sierra Nevada ; Dufheld's Ranch and Big Trees, Calaveras County, Bigelow, Brewer, 

 Goodale, Mann. Apparently the same plant, though with rather narrower and acuter leaflets, 

 has been found by Nevius in the Blue Mountains of Oregon and by Gcyer in Northern Idaho. 



L. polymorphus, Nutt. Rather stout, usually low, somewhat finely pubescent or glabrous, 

 glaucous : stipules narrowly acuminate ; leaflets 3 to 6 pairs, narrowly oblong, acute, thick and 

 strongly nerved, an inch or two long : flowers very large, purple : pod two inches long, 3 or 4 

 lines wide : seeds with a remarkably narrow stalk and short liilum. — This species ranges from New 

 Mexico and Colorado to Centra] Arizona, and perhaps to the borders of California. L. ornatus, 

 Nutt. , of Colorado and Utah, has narrower and shorter leaves, broader pods, and broader seed-stalk. 



+- ■¥- Peduncles very short, 1-jiowered. 



9. L. Torreyi, Gray. Sparingly villous throughout, erect, very slender, a foot 

 or two high : stipules narrow, acuminate, the lower lobe short ; leaflets thin, 4 to 6 

 pairs, with or usually without a similar one terminating the slender rhachis, ovate 

 to oblong, acute, about half an inch long : flowers purplish, 4 to 6 lines long : calyx- 

 teeth narrowly subulate, nearly equal and exceeding the tube, or the upper some- 

 what shorter and broader : pod linear-oblong, pubescent, an inch long, 3 - 5-seeded. 

 — Proc. Am. Acad. vii. 337 ; Torrey, Pot. Wilkes Exp. 267. L. (?) villosus, Torr. 

 in Pacif. E. Eep. xii. 58. 



In thickets near the coast, Shelter Cove, Humboldt Co. (Bolander) ; Washington Territory, 

 Pickering, Cooper, Hall. 



17. CEHCIS, Linn. Red-bud. Judas-tree. 

 Calyx campanulate, very broadly and shortly 5-toothed. Petals 5 ; the standard 

 smaller and enclosed by the wings. Stamens 10, free; anthers versatile, longitudi- 

 nally dehiscent. Pod shortly stipitate, oblong, flat, and thin, many-seeded, 2-valved ; 

 the ventral suture narrowly winged. Seeds compressed, obovate, transverse, albu- 

 minous. — Small trees; leaves simple, cordate to reniform, entire, palmately-veined ; 

 stipules caducous ; flowers on slender pedicels in axillary fascicles, appearing before 

 the leaves, red or purplish. 



A genus of 4 species, one belonging to Europe, one to temperate Asia, one in the Atlantic 

 States, and a fourth in California and eastward. 



1. C. occidentalis, Torr. A small tree or shrub, glabrous: leaves round-cor- 

 date, very obtuse and not at all produced above, occasionally emarginate, about 2 



