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LINACEAE. 
3. Linum aristatum Engelm. In arid places from Colo, and Utah to Tex. 
and Ariz.—“ Colorado ”; exact locality not given. 
4. Linum australe Heller. On dry plains and hills from Colo, to N. M. 
and Ariz.; also Mex.—Alt. 4000-8000 ft.—Arboles; La Veta; Mancos Canon; 
Dixon Canon; Durango. 
5. Linum rigidum Pursh. On dry plains and hills from Sask. and Alb. to 
Mo. and Colo.—Alt. 4000-7000 ft.—Livermore, Larimer Co.; foot-hills western 
Larimer Co.; Dillon ; Durango. 
6. Linum puberulum (Engelm.) Heller. (L. rigidum puberulum Engelm.) 
On dry plains and hills from Colo, and Nev. to Tex. and Calif.—Alt. 4000- 
6000 ft.—Grand Junction; Walsenburg. 
7. Linum arkansanum Osterh. Sandy soil from Neb. and Colo, to Kans. 
and Tex.—Rocky Fork, Otero Co. 
Family 74. OXALIDACEAE Lindl. Wood-sorrel Family. 
Plants acaulescent, perennial with bulb-like rootstock; corolla rose-violet, 
1. Ionoxalis. 
Plants caulescent, not succulent, annuals or perennials with slender rootstock; 
corolla yellow. 2. Xanthoxalis. 
1. IONOXALIS Small. Violet Wood-sorrel. 
1. Ionoxalis violacea (L.) Small. (Oxalis violacea L.) On prairies and in 
valleys from New England and Minn, to Fla. and Colo.—Glen Eyrie. 
2. XANTHOXALIS Small. Yellow Wood-sorrel, Sourgrass. 
Inflorescence umbellike; pods pubescent. 1. X. stricta. 
Inflorescence dichotomous-cymose; pods glabrous. 2. X. coloradensis. 
1. Xantoxalis stricta (L.) Small. ( Oxalis stricta L.) In woods, culti¬ 
vated soil and roadsides, from N. S. and S. D. to Fla., Tex. and Colo.—Alt. 
4000-8000 ft.—Boulder; Pagosa Springs; foot-hills, Larimer Co.; gulch west 
of Pennock’s; mountains northeast of Dolores; Howe’s Gulch; Redstone; 
Horsetooth Gulch. 
2. Xantoxalis coloradensis Rydb. In gulches and in river valleys of Colo, 
and Black Hills of S. D.—Alt 5000-9000 ft.—Gulch in foot-hills, Larimer Co.; 
Sangre de Cristo Creek; New Windsor, Weld Co.; along Poudre; Redstone; 
Ft. Collins; Mason’s river-front farm. 
Family 75. ZYGOPHYLLACEAE Lindl. Caltrop Family. 
Herbs; albumen none; fruit not villous; carpels 10-12. 1. Kalstroemia. 
Shrubs; albumen horny; fruit villous; carpels 5. 2. Covillea. 
1. KALSTROEMIA Scop. 
Sepals lanceolate, appressed-pubescent. 1. K. maxima. 
Sepals linear-subulate, bristly hirsute. 2. K. hirsutissima. 
1. Kalstroemia maxima (L.) T. & G. (Tribulus maximus L.) Waste 
places and sandy soil in the Gulf States.—Rocky Ford. 
