North American Polygonaceae. 48 



branched; branches densely tufted, about I cm. long, clothed by 

 the persistent leaves : leaves densely imbricated and crowded, the 

 persistent ones of previous years, black, the fresh ones gray, 

 spatulate or almost terete by the strongly revolute margins, ob- 

 tuse, dilated at the base : peduncles erect, 5-10 mm. tall, simple; 

 involucres solitary, turbinate-campanulate, 2.5 mm. high, fluted : 

 segments triangular-ovate somewhat converging calices, villous at 

 the base, 2.5-3 mm. long ; segments unequal, the 3 outer segments 

 oval, the 3 inner obovate, all obtuse : filaments villous at the base : 

 achenes 3-angled. 



At high altitudes in the Cascade Mountains, Washington. 

 Summer. 



This excellent little species has posed as Eriogonum acaide, but 

 a casual observation is sufficient to demonstrate the impossibility 

 of such a disposition. Besides its more slender habit, the white 

 woolly pubescence in the case of E. acauk and the gray canescent 

 pubescence in the case of E. minimum serve as a ready means of 

 separation ; further, the smaller fluted peduncled involucres and 

 the calices villous only at the base cannot be specifically associated 

 with the corresponding organs of Eiiogomim acaule. The original 

 specimens were collected on the Cascade Mountains, Washington, 

 in 1882, by Mr. T. S. Brandegee. Number 372. 



Ekiogonum clavellatum. 



Perennial from a thick, woody base, pale green. Stem gnarled, 

 branched; branches clustered, thinly tomentose; leaves fleshy, 

 strongly revolute, cylindric-clavate, I— 1 .5 cm. long, obtuse, glab- 

 rous without; petioles slender, 1-2 mm. long, tomentose: pedun- 

 cles club shaped, 1-2 cm. long, simple or rarely forked : bracts 

 scale-like : involucres deciduous, long campanulate, 4 mm. long, 

 rib-angled ; segments acute, dark green, erect : calices glabrous, 

 pink, (?) 3.5 mm. long, urn-shaped ; segments saccate at the 

 base, bent out at the middle, crisped, the 3 outer fiddle-shaped, 

 apiculate, the 3 inner rather cuneate, narrower than the outer, 

 acutish : filaments villous at the base : achenes 3-angled, glabrous. 



On rocky hill, Barton Range, southeastern Utah. Summer. 



A low and one of the more peculiar species, most closely re- 

 lated to Eriogonum cricaefolhim and E. bicolor from which it can be 

 separated by the club shaped leaves and peduncles, the struc- 

 ture of these organs being unique in the genus. The branches 

 of the inflorescence and the flowers are loosely articulated and 

 easily fall away. 



