ACCESSIONS TO APOCYNUM. 185 



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neath; flowers few, pinkish, large for the plant, in subsessile 

 terminal and subterminal cymes ; sepals very short, deltoid- 

 ovate, barely acute, of hardly one-fourth the length of the 

 broad subcampanulate tube of the corolla; corolla-lirab of 

 deep narrowly oval and obtuse spreading lobes. 



The fine specimen in U. S. Herb., representing a very 

 marked species, is from Jackson Co., southwestern Oregon, 

 and was collected 14 July, 1892, by E. W. Hammond. The 

 foliage in this is so copious, and so perfectly heart-shaped as 

 to invite, better than any other species, such a name as corda- 

 tum or cordigerum. 



Apocynum plumbeum. Dwarf 5 to 7 inches high, parted 

 mto 3 or 4 branches widely spreading from near the base, 

 each with a compound -cymose terminal inflorescence, the 

 whole herbage glabrous and of a leaden gray with density of 

 bloom ; lowest leaves orbicular, only /^ inch across, the others 

 twice or more than twice as large, ovate, obtuse, mucronate, 

 spreading or even drooping on their short but slender petioles : 

 flowers very small, reddish or purplish, the calyx with dis- 

 tinctly turbinate and undivided basal part, and broadly lan- 

 ceolate segments not equalling the middle of the corolla, this 

 tubular and slightly ventriose to near the summit, there cleft 

 into oblong recurved lobes. 



Western Nevada, in the Walker River region, collected fifty 

 years since by W. H. Brewer, ** near West Branch of Walker 

 River.'* Remarkable for the dull lead-color of the stem and 

 both faces of the foliage, and hardly less so for the small tub- 

 ular corollas that imitate those some ericaceous plants. 



Apocynum xylosteaceum. Plants 6 inches high, the stem 

 naked below for about 2 inches, then parted into several sub- 

 erect branches closely leafy and flowering terminally and in 

 some upper axils; leaves all small, ovate varying to oval, 

 mostly % inch long, obtuse at both ends, nearly all abruptly 

 deflexed, of a very dull dark green above, glaucous beneath, 

 glabrous everywhere ; flowering copious in terminal and a few 



