140 PEA FAMILY 



Plant glabrous. 

 Root perennial. 



Flowers white ; introduced species 10. T. repens. 



Flowers purplish; native species 11. T. bolanderi. 



Root annual; native species 12. T. gracilentum. 



1. T. monanthum Gray. Stems numerous, mostly spread- 

 ing from a thick root, inch or two to a foot long. Leaves 

 obovate, fy$ in. or less long, nearly entire. Heads on pedun- 

 cles rarely */ 2 in. long; involucre of 4 to 9 distinct bracts not 

 fa in. long. Flowers white (often pink-veined) with dark- 

 purple centers. Pod 1 to 3-seeded. 



This clover, which ranges from middle altitudes to above 

 timber-line, was first described from specimens collected at 

 the Soda Springs of the Tuolumne. These were of the sub- 

 alpine form, in which the plants are nearly glabrous and the 

 heads only 1 to 3-flowered. At lower elevations the stems are 

 longer and more spreading, the herbage more hairy, and the 

 heads 3 to 8-flowered. This latter form is the var. parvum 

 McDer. (T. multicaule Jones). None of our other species 

 resemble this one, except no. 5, and that has larger, toothed 

 bracts. 



2. T. obtusifldrum Hook. Stems stout, erect, 1 to 2 ft. 

 high. Leaflets narrow-elliptic or oblanceolate, about 1 in. 

 long, Y^ in. wide, with many spine-like teeth; stipules large, 

 cut-toothed. Heads purplish, 1 in. or more across, on pedun- 

 cles 1 to 3 in. long; involucre irregularly cut into many spine- 

 like lobes. 



The remarkable clamminess readily distinguishes this spe- 

 cies in the field, the robust plants being wet, as though with 

 dew, even on dry days. The heads are larger than in any of 

 our other clovers. It grows above Mirror Lake, near the El 

 Capitan Bridge, near Alder Creek, at El Portal, etc., and is 

 probably not rare in the mountains although nowhere 

 abundant. 



3. T. tridentatum Lindl. Stems erect from a curved base, 

 very slender, l / 2 to 1}4 ft. high. Leaflets slenderly lanceolate 

 or linear, 24 to 1*4 m - long, sharply toothed, the tip awl-like; 

 stipules toothed. Heads purplish, 24 m - across, on peduncles 

 1 or 2 in. long; involucre with slender lobes. — Shady places in 

 the foothills, but reaching 6200 ft. alt. in Little Yosemite 

 Valley. 



4. T. spinuldsum Dougl. Stems decumbent to erect, stout, 

 6 to 12 in. high, the whole plant glabrous. Leaflets broad- 

 elliptic or oblong, mostly 24 m - long and }4 to 3 A in. wide, 

 short-tipped, minutely sharp-toothed, the midrib and cross- 



