the free portion shortly acuminate; petioles from only slightly to many times longer 

 than the leaflets; leaflets 3, obovate but usually somewhat retuse to obcordate, 

 1-2 cm. long, finely serrulate; heads axillary, often long-pedunculate, 1.5-2 cm. 

 broad, nearly as long, noninvolucrate; flowers 5-9 mm. long, white or cream to 

 pinkish-tinged, pendulous at anthesis on pedicels 2-5 mm. long; calyx glabrous, 

 about half the length of the corolla, the teeth lanceolate-subulate, about equal to 

 the tube; banner much more erect than in the native clovers; legume 1- to 3- 

 seeded. 



Wet meadows, marshes and in wet soil about ponds and along streams, in Okla. 

 (Waterfall), N. M. (Otero, Rio Arriba, San Juan, San Miguel, Santa Fe and Taos 

 COS.) and Ariz. (Navajo, Coconino, Mohave, Yavapai and Cochise cos.), May- 

 Sept.; introd. from Eur. and now widely established in w. N. A. 



15. Trifolium hybridum L. Alsike or Alsatian clover. 



Perennial, glabrous or very nearly so; stems erect or ascending, 3-6 dm. tall, 

 branching, often stout and succulent; stipules ovate-lanceolate, 12-25 mm. long, 

 acuminate-attenuate, membranous; leaflets 12-25 mm. long, petiolulate, elliptic 

 to obovate, rounded and occasionally emarginate at apex, cuneate at base, serru- 

 late with sharp-pointed teeth; heads globose, long-peduncled, not involucrate; 

 flowers white and pink, turning brown after anthesis, 6-8 mm. long, reflexed; pedi- 

 cels slender, 5-10 mm. long; calyx glabrous, the linear-subulate teeth about equal- 

 ing the tube, 1.7-2.5 mm. long; corolla much-exceeding the calyx teeth. 



In wet meadows, along irrigation ditches, streams and in marshes, in Okla. 

 (Waterfall) , N. M. (Rio Arriba and San Miguel cos.) and Ariz. (Coconino Co.), 

 July-Sept.; introd. from Eur. and now widespread. 



9. Lotus L. Deer Vetch. Trefoil 



Annual or perennial leafy herbs, usually 1-5 dm. tall; leaves alternate, once- 

 pinnately 3- to 5-foliolate or by reduction palmately trifoliolate; petioles short, 

 often shorter than the rachis or not much longer; stipules in one species well- 

 developed and in the others nearly obsolescent and glandlike; leaflets small, rarely 

 more than 1 cm. long, linear to nearly orbicular, usually with appressed pubes- 

 cence, usually entire; stipules absent; peduncles usually several cm. long, emerg- 

 ing from the upper axils and longer than the leaves; flowers about 1 cm. long, 

 solitary or paired or in umbel-like groups at the end of the peduncle; calyx cylin- 

 dric to campanulate with more or less equal lobes at the end of the tube; corolla 

 papilionaceous, the petals usually basically yellowish or whitish but with red, 

 rose or purple areas; banner external to the rest in bud, ovate to obovate; wings 

 obovate or oblong and adhering to the incurved keel of usually fused petals; 

 stamens 10, diadelphous, 9 with filaments coalescent and the tenth (uppermost) 

 free, the filaments (all or part of them) expanded just below the anthers; ovary 

 sessile; legume linear, usually 1-3 (-4) cm. long, nearly straight, dark-brown, 

 thin-walled, promptly dehiscent, acute; seeds numerous. 



A genus with about 120 species in temperate areas of the Old World and New 

 World. 



As in the case of clovers, both the seeds and foliage of these species are relished 

 by wildlife. 



1. Stems stout, erect or nearly so; leaflets 7 to 11, narrowly lanceolate to elliptic 



or obovate, 1-3 cm. long; corolla 10-14 mm. long, purple- veined; 



pods about 2 mm. wide 1. L. oblongifolius. 



1. Stems slender, procumbent; leaflets 3 to 5, broadly obovate, less than 1 cm. 



long; corolla usually 4-7 mm. long; pods 1-1.5 mm. wide 



2. L. alamosanus. 



1053 



