blades slightly fleshy, not deltoid but oblong, usually 2 or 3 times as long as 

 broad and rather blunt, the lower corners often prolonged parallel to the petiole. 

 Conoclinium betoniciun DC. and var. integrifoUum Gray, C. betonicifoUum (Mill.) 

 King & Rob. 



Subsaline marshes and poorly drained areas, s.e. Tex. (n. to Refugio Co.) and 

 Rio Grande Plains, n.w. to Val Verde Co. 



The plants farther inland (Val Verde Co., etc.) have less distinctly serrate 

 leaves, and perhaps deserve varietal recognition. 



6. Eupatorium leucolepis (DC.) T.&G. Justice-weed. 



Perennial herb from a short knotty fibrous-rooted stock; stems erect, 8-12 dm. 

 tall, minutely gray-puberulent; leaves opposite, firm and fairly thick, nearly sessile, 

 those of midstream 3-8 cm. long and 5-9 mm. broad, broadly linear or narrowly 

 oblong, dull-gray, bluntish, on each side in the upper two thirds to five sixths the 

 length with 7 to 12 appressed teeth; heads about 5-flowered, dirty-white, in a 

 roughly corymiform arrangement at the tip; involucre inverted-conical, about 

 7 mm. high; phyllaries in 2 or 3 series, sharply diflferentiated with a minute 

 outer series and the longer inner series, the longer ones subulate, acute, mostly 

 herbaceous, with a narrow white margin and white tip-portion (often as much as 

 a third the total length); corollas 3-4 mm. long. 



Rare in e. and s.e. Tex. (Hardin, Jasper, Orange and Tyler cos.) in sandy 

 or boggy woods, Oct.; near the coast, N.Y. to Tex. 



7. Eupatorium pycnocephalum Less. 



A subshrubby weedy plant 3-8 dm. tall, with slender striate-puberulent mostly 

 herbaceous stems and sparsely puberulent opposite leaves; petioles slender, 1-3 

 cm. long; leaf blades deltoid-ovate, broadly cuneate to subtruncate at base, 

 acute to acuminate at apex, mostly 1-2 cm. wide, 1.5-5 cm. long, irregularly 

 crenate-serrate; heads 4-6 mm. long, nearly as wide, about 25-flowered, aggre- 

 gated in dense rounded corymbs disposed in leafy-bracted panicles; involucres 

 broadly campanulate to nearly hemispheric, about 4 mm. high; outer phyllaries 

 ovate and acute to acuminate, puberulent, 0.5-1.2 mm. long, middle and inner 

 phyllaries elliptic to oblong, rounded or obtuse at tip and nearly or quite glabrous 

 and striate-nerved: corollas pale-purple or rarely white, about 2 mm. long; achenes 

 1-1.4 mm. long, faintly angled and sparsely puberulent on angles; pappus bristles 

 whitish, slightly longer than achenes. 



Rich soil along streams, mountain sides and canyons in Ariz. (Cochise, Santa 

 Cruz, Pima and Pinal cos.), May-Oct.; s. Ariz., s. to S.A. 



8. Eupatorium Greggii Gray. 



Perennial herb, the bases fibrous-rooted and occasionally subrhizomatous; aerial 

 stems weak, 3-8 (-12) dm. tall, often tortuous, sometimes semiscandent, the 

 uppermost 1-2 dm. of the branches few-noded; leaves opposite, nearly sessile, 

 ovate or deltoid in over-all outline but deeply palmately 3-lobed with the 3 main 

 lobes again pinnately dissected, pubescent and minutely resin-dotted; heads in 

 tight subcorymbiform clusters terminating the branches; involucre hemispheric, 

 4-6 mm. high; phyllaries in about 3 subequal series, linear-subulate, pubescent, 

 obscurely 3-nerved; receptacle conical, naked; flowers numerous, the corollas blue 

 or purplish-blue; achenes black, columnar, 5-ribbed; pappus persistent, of a num- 

 ber of stiflfish bristles. Conoclinium Greggii (Gray) Small. 



Frequent along stream beds and in overflow areas in the Tex. Trans-Pecos, 

 infrequent e. to Edwards Plateau and Rio Grande Plains, N.M. (Dona Ana and 

 Socorro cos.) and Ariz. (Cochise Co.), spring-fall; Tex., N.M., Ariz, and n. Mex. 



1605 



