180 LEAFLETS. 



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petioled, widely spreading ; cymes both terminal and axillary, 

 elongated and many-flowered, in full development forming an 

 ample inflorescence, yet not at all corymbose; sepals ovate, or 

 lance-ovate; corolla pinkish or purplish, not large, the tube 

 cylindric but very short, the segments as long or longer. 



An ally of A. androsaemi folium from the Guadalupe Moun- 

 tains of Texas, collected by Vernon Bailey, 19 Aug., 1901. 

 The foliage is well characterized both as to form and texture. 

 The corollas are smaller than in the more familiar ally, far 

 more numerous, and of different form, being in no wise 

 campanulate. 



Apocynum vacillans. Plant of the largest, probably very 

 tall, glabrous throughout, the herbage vivid green as to upper 

 faces, the lower singularly ash-colored by something like a 

 grayish bloom, but this hardly effaceable : cauline leaves lance- 

 ovate, 4 or 5 inches long, 2 inches broad below the middle, 

 subsessile, rounded at base, at apex scarcely mucronate but 

 acute ; those of the branches not half as large, almost precisely 

 elliptical, acute at base, at apex very acute : cymes few- 

 flowered, most terminal but some lateral, and all sessile : 

 flowers rather small, not erect ; sepals lanceolate, nearly 

 equalling the short tube of the campanulate corolla, of which 

 also the segments are long, equalling the tube, the whole 

 corolla colored much as in A. midrosaenti folium. 



The only specimen before me of this fine plant was collected 

 somewhere in the State of Washington as long ago as 1889, 

 by Geo. R. Vasey, and preserved in U. S. Herb. Some one 

 has labelled it A. cannabinwn. I^ooking at nothing but the 

 upper face of the leaves, this would be any one's hasty judg- 

 ment of it as to its nearest affinity, for not only is that face of 

 the shade of green characteristic of that group, but the leaves 

 are rather ascending than otherwise ; at least, they have not 

 the spread, much less the decided droop of those of A. andros- 

 aemifoliimi; but when one attends to the inflorescence and the 

 flowers one finds them entirely those of the group headed by 

 the species last named. It is the best case I have met with 



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