FABACEAE. 
217 
8. Vicia producta Rydb. On gravelly hills and sides of canons from Colo, 
and Utah to N. M. and Ariz.—Alt. 7000-8000 ft.—Butte five miles southwest 
of La Veta; Brantly Canon, Las Animas Co.; Spring Canon. 
34. LATHYRUS L. Velchling, Marsh Pea. 
Flowers less than 18 mm. long; corolla white. 
Leaflets oval to oblong. 1. L. leucanthus. 
Leaflets linear. 2. L. arizonicus. 
Flowers about 2 cm. or more. 
Corolla purple. 
Stipules large and broad, about half as long as the leaflets. 
3. L. utahensis. 
Stipules narrow, less than half as long as the leaflets. 
Leaflets elliptic to oval; upper leaves at least with well deveoped tendrils. 
4. L. decapetalus. 
Leaflets linear or nearly so ; tendrils reduced to cusps or small appendages. 
Plant glabrous or nearly so. 5. L. ornatus. 
Plant decidedly villous-pubescent. 6. L. incanus. 
Corolla white or yellowish. 7. L. laetivirens. 
1. Lathyrus leucanthus Rydb. Hillsides, among bushes and open woods, 
in Colo, and N. M.—Alt. 8000-11,000 ft.—Empire; Veta Pass; Ojo; above 
Mancos; Boulder; Tennessee Pass, Lake Co.; Pass Creek; mountain near 
Veta Pass; Rico, Dolores Co.; West Indian Creek; Los Pinos (Bayfield); 
North Park, near Teller;. Van Boxle’s ranch, above Cimarron; Victoria; 
Leroux Creek; Michigan Fork; Spicer. 
2. Lathyrus arizonicus Britton. On wooded hillsides from Colo, to Ariz.— 
Alt. 8000-11,000 ft.—West Mancos Canon; Mt. Hesperus; Grayback mining 
camps and Placer Gulch; Pass Creek; Iron Mountain; West Indian Creek. 
3. Lathyrus utahensis Jones. In valleys of Utah and Colo.—Parrott; 
Durango. 
4. Lathyrus decapetalus Pursh. On plains and table-lands from Colo, and 
Utah to N. M. and Ariz.—Alt. 7000-8000 ft.—Cato; Cucharas River, below 
La Veta; Calhan; Mancos; Palmer Lake; Robinson; Mancos Canon; Swal¬ 
lows, between Pueblo and Canon City; Gunnison; Sapinero. 
5. Lathyrus ornatus Nutt. On prairies and plains, S. D. and Wyo. to Ind. 
Terr, and Colo.—Alt. 4000-8000 ft.—Mesas near Colorado Springs; Dillon 
Canon; along Conejos River, north of Antonito; Dolores; Colorado City. 
6. Lathyrus incanus (Rydb. & Smith) Rydb. (L. ornatus incanus Rydb. 
& Smith.) On sandy plains from Neb. and Wyo. to Colo, and Utah.—Alt. 
4000-8000 ft.—Table Rock; Palmer Lake; Calhan. 
7. Lathyrus laetivirens Greene. In the mountains of Colo.—Alt. about 
8000 ft.—Cerro Summit; Steamboat Springs. 
Order 28. GERANIALES. 
Plants destitute of secreting glands or cells in the tissue. 
Styles united around a central column from which they break at maturity. 
Fam. 72. Geraniaceae. 
Styles distinct or permanently united. 
Styles distinct or partly united; the tips and the stigmas free. 
Leaves simple; stamens 5. 73. Linaceae. 
Leaves compound; stamens 10-15. 74. Oxalidaceae. 
Styles and stigmas permanently united. 75. Zygophyllaceae, 
Plants with secreting glands often in the leaves or only in the bark. 
76. Rutaceae. 
