I02 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



39. Medicago denticulata Willd., Sp., Vol. Ill, p. 1414. 

 (Index Kewen.) 



This has been reported from all the islands except Santa 

 Rosa. On San Nicolas it was found on two slopes. The 

 specimen at hand is unusually luxuriant. The leaflets are 

 from 2-2)^ cm. long and about 2 cm. wide; petioles 3-4 

 cm. long; peduncles 2-3 cm. long. 



40. Astragalus didymocarpus //. & A., Bot. Beech., 

 p. 334, T. 81. "California." 



This has been reported only from Santa Cruz. It has 

 been collected on Santa Catalina recently by Mrs. Trask. 

 On San Nicolas it was found only on the cliffs of a briny 

 stream. 



41. Astragalus Traskiae, sp. nov. 



Plate VIII, Figs, ba-dd. 



Stems densely white-tomentose, slightly viscid, several growing in a clump 

 about 3 dm. high ; leafy and branching : leaves shorter than the peduncles ; 

 leaflets canescent with appressed hairs, 20 or 25, alternate or opposite, oblong 

 or obovate, obtuse, 10-15 titi- long. 3~5 mm. wide, one-nerved ; stipules 

 distinct, narrowly linear, 2 mm. long: peduncles 12-15 cm. long, erect, 

 obscurely ribbed : raceme short when in bloom, elongating in fruit to about 

 9 cm. ; bracts persistent, nigrescent, subulate ; pedicels 2 mm. long, equalling 

 or a little shorter than the bracts ; calyx nigrescent, campanulate, 7-10 mm. 

 long, with subulate divisions shorter than the tube ; corolla yellowish white, 

 glabrous ; keel deeper yellow than the enfolding and surpassing wings, 5 

 mm. long without the claw ; wings narrower, auriculate at base, 8 mm. long, 

 with a claw 7 mm. long, equalling that of the keel ; banner oval, attenuate to 

 the claw, abruptly narrowing towards the emarginate apex, 15 mm. long, 

 6 mm. wide : legume coriaceous, transversely reticulate under the white 

 wool, erect or spreading, exserted from the calyx on a stipe 5-8 mm. long ; 

 2-celled from the intrusion of the dorsal suture, subfalcate, attenuate at apex 

 to the long, persistent style ; seeds immature. 



This is closely allied to A. Nevinii Gray^, which was 

 collected on San Clemente Island by Nevin and Lyon. It 

 differs from this species in its more robust habit, shape 

 and size of the leaflets, and character of the pod. The 

 specimen of A. Nevinii vcs. the Herbarium of the Academy 



1 Proc. Am. Acad., Vol. XXI, p. 412. 



