MISCEI^LANSOUS SPECIFIC TYPBS. — III. 105 



Miscellaneous Specific Types. — III. 



Abronia latiuscula. Root not known, probably per- 

 ennial : stems a foot long and more, evidently procumbent, 

 stoutish and firm, rather loosely leafy and floriferous, the 

 internodes 2 inches long or more, purplish and very glaucous, 

 glabrous, or with only here and there a scabrous hair : leaves 

 short-petioled, flat and suborbicular, the lowest quite orbicu- 

 lar, 1}4 inches long and broad, the later smaller and mani- 

 festly broader than long, some of the floral round-ovate, all 

 very obtuse, the petiole mostly somewhat shorter than the 

 short blade, this green and nearly glabrous on both faces, but 

 above dotted sparsely with whitish low pustules, the texture 

 thinnish : petioles firm , quite surpassing the leaves : bracts of 

 the inflorescence not large, oval or ovate : perianths of middle 

 size, the tube flesh-color, the limb white or pinkish : fruits 

 small for the plant, obtusely and unequally 5-angled, puberu- 

 lent on the sides, viscid-hirtellous at summit. 



Plant from Fallon, Nevada, obtained in the spring of 1910 ; 

 name of collector not known. 



Apocynum ABDITum. Of the alliance of A. ca7inabinum 

 and as small-flowered, but flowers white : plant 2 feet high 

 and slender, glabrous except as to lower face of foliage : 

 leaves lance-oblong to elliptic, the lower and larger 2 to 2J^ 

 inches long, those of the ascending branches half as large, all 

 deep-green above, with light-colored veins, glaucous beneath 

 and with a sparse villous- hirsute hairiness along the veins : 

 flowers produced only in terminal compound cymes, not very 

 numerous in the cyme ; sepals white, lanceolate, acuminate, 

 nearly as long as the corolla, this white, campanulate, the 

 lobes oblong-oval, scarcely acute, spreading campanulately. 



In moist soil, in the bed of a deep canon at some point in 

 northern Arizona, 1909 ; the collector G. A. Pearson. The 

 species decidedly an elegant one ; the properly terminal cyme 

 quite surpassed by those at the ends of the laterals, this quite 

 as in ^. cannabinum, the common green -flowered species of 

 IvEAFLETS, Vol. II, pp. 105-120. 6 October, 1910. 



