370 COMPOSITE. Palafoxia. 



Dry pine woods, Southern Georgia ! and Florida 1 Aug.-Oct. — If Stem 

 2-5 feet high. Heads half an inch or more in length. Corolla, and some- 

 times the pappus purplish ; the tube slightly pubescent. Achenia 3-4 lines 

 long, blackish ; the feathery pappus somewhat lacerate-denticulate. 



117. CH^NACTIS. DC. j^odr. 5. p. 659 ; Hook. Sf Arn. bat. Beechey. 



Heads many-flowered ; the flowers all tubular and perfect ; the exterior 

 series (rays) more or less dilated and larger than the others, irregular or pal- 

 mate. Scales of the campanulate involucre about 20, linear, nearly in a 

 single series. Receptacle alveolate. Corolla glabrous or slightly glandular, 

 the lobes hirsute-puberulent ; of the disk tubular, slightly dilated above, 

 5-toothed; of the ray expanded or ventricose above, 5-cleft. Branches of the 

 style linear-filiform, with long and slender acuminate hirsute appendages. 

 Achenia linear, tapering to the base, 4-angled. Pappus of 4-12 somewhat 

 unequal membranous nerveless scales, with irregularly denticulate mar- 

 gins ; in the disk-flowers rather shorter than the corolla and about the length 

 of the achenium; in the ray much shorter, obtuse. — Biennial, sometimes 

 annual or perennial ? herbs (natives of California, Oregon, and the Rocky 

 Mountains) ; with alternate pinnately dissected leaves, and rather large 

 heads terminating the simple or corymbose branches. 



§ 1. Flowers mostly yellow ; those of the ray irregular or palmate, exserled : 

 achenia minutely strigose : pa2>pus of A-G scales ; in the disk ohlong-lancea- 

 late, acute, in the ray much shorter and obtuse. — Euchsnactis. 



1. C. glabriuscula (DC): perennial or suflruticose ; stem branching; 

 leaves and involucre nearly glabrous, or with scattered cobwebby hairs; the 

 expanded rays palmatiHd, evidently longer than the disk ; branches naked 

 at the summit ; lobes of the leaves 5-6 pairs, rather obtuse ; the uppermost 

 leaves linear and entire. DC. prodr. 5. p. 659. 



California, Douglas. — We have no specimen of this plant. It is said to 

 be 8 to 16 inches high, arenose-villous in the young state, but glabrous when 

 mature; the peduncles, or naked summit of the branches, 2i inches long. 

 Scales of the pappus 5-6. 



2. C. tenuifolia (Nutt.) : annual or biennial, nearly glabrous ; the involu- 

 cre and short peduncles glandular-viscid; leaves 1-2-pinnately parted ; the 

 divisions irregular, small, linear ; the uppermost leaves hnear and 3-5-cleft 

 at the apex ; ray-flowers funnel-form, expanded, scarcely irregular, rather 

 longer than the disk. — Nutt.! in trans. Amcr. jjhil. soc. (n. ser.) 7. p. 375. 



St. Diego, California, Nuttall ! May. — About a font high, much branched. 

 Divisions of the leaves numerous, 2-4 lines long. Heads as large as in the 

 following species. Flowers bright yellow. Scales of the involucre numer- 

 ous, narrowly linear, concave ; a few similar scales also interposed between 

 the ray and disk-flowers. Pappus of 4 unequal scales. — The leaves in our 

 specimens by no means resemble those of Hymenopappus filifohus, but those 

 of the following species do so. Nerves of the lobes of the corolla intramar- 

 ginal, as in Hymenopappus. 



3. C. lanosa (DC.) : annual, clothed with a soft and loose somewhat de- 

 ciduous white wool ; stems branched from the base, simple and naked above ; 

 leaves (often glabrous when old) on slender petioles, pinnately parted ; the 



