502 PATAGONIAN EXPEDITIONS: BOTANY. 



2. TRIFOLIUM POLYMORPHUM Poir. 



Villous, creeping. Leaflets obcordate, cuneiform, denticulate, nervose. 

 Stipules broad with deflexed mucro. Heads subrotund, long-peduncled, 

 axillary, at length deflexed. Calyx-lobes short, subtetragonal. Standard 

 long. 



(Argentina); Magellan. 



3. T. REPENS Linn. White Clover. 



Creeping perennial, nearly glabrous. Heads on long peduncles, glo- 

 bose, white or pinkish, 16 mm. in diameter. Leaves long-petioled ; leaflets 

 usually obovate, denticulate. 



Temp. Eurasia, Nat. in Amer.; N. Patagon, by Rio Negro. 



1 6. GALEGA Linn. 



Glabrous, perennial herbs, with odd-pinnate leaves, entire, venous leaf- 

 lets, semisagittate stipules, and white or blue flowers in both axillary and 

 terminal bracted racemes. Calyx-teeth subequal. Standard obovate- 

 oblong. Keel obtuse. Stamens 10, united in a closed tube. Ovules 

 several. Legume linear-terete, acuminate, striate. Seeds transversely 

 oblong. 



Species 3. W. Asia and S. Eur. 



G. OFFICINALIS Linn. 



Leaflets lanceolate, mucronate. Racemes exceeding the leaves. (Fig. 

 in Eng. and Prantl, iii, 3, p. 268, H.) 



N. Patagon., banks of Rio Negro (introduced). 



17. ASTRAGALUS Linn. 



Herbs, sometimes woody, with odd-pinnate (rarely simple) leaves, and 

 blue, violet, or yellow flowers, mostly in spikes or racemes. Calyx-teeth 

 subequal. Standard erect, ovate or oblong. Wings oblong. Keel ob- 

 tuse, equalling the wings. Stamens diadelphous (i and 9), anthers all 

 similar. Legume often ovoid, i-2-celled, the sutures mostly intruding. 

 Seeds several. 



Species 1,000, most in N. Asia; many in W. and S. United States. 

 (not in S. Africa or Australia). 



