256 COMPOSITE. Chrtsopsis. 



11. C. foliosa (Nutt.) : uniformly canescent with a soft silky-villous pu- 

 bescence, and at the same time scabrous ; stems very leafy to the summit; 

 leaves oblono; or elliptical, obtuse, mucronulate, not tapering to the base, 

 closely sessile, or slightly clasping, with very scabrous margins; the lower 

 sometimes fringed with bristles towards the base ; heads fastigiate-corymbose, 

 crowded, nearly sessile ; involucre campanulate, canescent, rather shorter 

 than the disk ; the linear-subulate scales closely imbricated. — Nutt. ! in 

 trans. Amer. phil. soc. I. c. 



Plains of the Platte, in the Rocky Mountains, Nuttall ! Aug. — Stems 

 many from the same root, a foot high, canescent with villous soft spreading 

 hairs, but beneath this somewhat deciduous pubescence very scabrous. 

 Leaves about an inch long, and half an inch wide, appressed silky, and also 

 rough beneath this covering. Heads smaller than in C. villosa, with shorter 

 rays. Pappus brownish. — Allied to the following. 



12. C. canescens : silky-canescent throughout, suffrutescent at the base, . 

 much branched, rigid ; stems and fastigiate branches very leafy ; leaves 

 linear-oblanceolate or spatulate-oblong, mucronate-acuminate, tapering to 

 the base, sessile, fringed below the middle with long and scattered rigid bris- 

 tles ; heads mostly solitary terminating the crowded branchlets; scales of the 

 campanulate involucre subulate-linear, closely imbricated, canescent. — Aplo- 

 pappus ? (Leucopsis) canescens, DC! proclr. 5. 'p. 349; not Chrysopsis 

 canescens, DC. I. c. j}- 328, which is Erigeron (Pseuderigeron) filifolium. 



Texas, Bcrlandkr! Drummond ! Dr. RiddcLl! Aug.-Sept. — Variable 

 in the size and form of the leaves; those of the branchlets much smaller: 

 the branches occasionally bear a few bristles like those so cons|)icuous on the 

 margins of the leaves. Heads, involucre, and pappus (often ferruginous) 

 nearly as in C. foliosa, Nutt. Rays rather numerous and short. 



* * * Exterior pappus chaffy but very minute; tlie inner nearly in a single series: 

 heads subtended by foliaccous bracts similar to the upper leaves. (Phyllotheca, Nutt.^ 



13. C. ? sessilijlora (Nutt.) : hirsute throughout with spreading viscid 

 hairs ; stem branched ; leaves lanceolate or linear-oblong, acute, sessile, en- 

 tire ; heads solitary, shorter than the linear-lanceolate involucrate bracts; 

 scales of the involucre linear-subulate, slender, rather longer than the disk. — 

 Nutt. I in trans. Amer- pldl. soc. I. c. p. 317. 



St. Barbara, California, Nuttall! April. — It Plant with "a heavy aro- 

 matic odor and bitter taste," clothed with slender viscid hairs, with shorter 

 glandular hairs intermixed. Leaves an inch long. Rays about 30, narrow, 

 elongated -'with rudiments of stamina, or filaments. Appendages of the 

 style oblong, obtuse, shorter than the stigmatic portion. Ovaries villous. 



§ 3. Annual : leaves ohlong or lanceolate, somewhat veined ; the lower often 

 toothed: achenia obovate, compressed: exterior pappus of conspicuous rigid 

 chaffy scales ; the inner of 25-30 capillary bristles in a single series: recep- 

 tacle convex. — Achyr^a. (Subgen. Phyllopappus, Nutt. ; not of Walp.) 



14. C. pilosa (Nutt.) : villous with very soft and loose partly deciduous 

 hairs, and minutely viscid-puberulent; stem simple or loosel}' branched; 

 leaves lanceolate; the upper closely sessile, acute or mucronulate, entire; 

 the lowermost tapering to the base, often toothed ; heads nearly solitary ter- 

 minating the branches ; scales of the hemispherical involucre narrowly linear, 

 very acute, villous and viscid, almost equal, as long as the disk, achenia pu- 

 bescent, obscurely impressed-striate. — Nutt. ! in jour. acad. PJnlad. 7. p. 66, 

 4* trans. Amer. phil. soc. I. c. 



