Calycadenia. COMPOSITiE. 401 



on the short branchlets and at the base of the heads, orfascicled In the axils 

 of the cauline leaves) usually terminated by a large, sessile or stipitate, ace- 

 tabuliforra gland. Heads terminal or axillary. Corolla of the disk and ray 

 white : anthers dark brown. 



The flowers are apparendy white in all the species, not yellow, as stated by De 

 Candolle. The pappus is not mentioned in the generic character of the latter au- 

 thor; whence EndUcher has incautiously introduced the phrase " Pappus nullus." 



§ 1. Slem simple, strict: floral leaves tipped with a large saucer-shaped or 

 nail-headed gland : rays somewhat convolute, tmequally and often deeply 

 3-cleft: teeth of the disk-corolla short, ovate. — Eucalycadenia. 



1. C. truncata (DC. ! I. c.) : stem very glabrous ; leaves slightly sca- 

 brous ; the upper cauline, as well as the fascicled floral ones, tipped with a 

 nearly sessile gland ; heads terminal and axillary, subsessile, solitary, re- 

 mote ; chaff of the receptacle truncate, scabrous on the back, distinct or 

 nearly so ; pappus of 7-10 oblong obtuse scales, incisely toothed at the apex, 

 several times shorter than the corolla or the slightly hairy disk-achenia. 



California, Douglas ! — Stem reddish, shining. Achenia of the ray gla- 

 brous, somewhat rugose. 



2. C. villosa (DC. ! 1. c.) : stem hirsute with white hairs ; leaves setose- 

 hispid towards the base ; the floral ones, as well as the scales of the involu- 

 cre, very villous below, mostly tipped with a stipitate gland ; heads termi- 

 nal and axillary, remote, solitary, nearly sessile ; chaff of the receptacle 

 acute, liairy towards the apex, often united ; achenia villous ; pappus of 

 about 10 rigid subulate-awned denticulate-scabrous scales, as long as the 

 disk-corolla. — Hook. S^- Arn. ! hot. Beechey, suppl. p. 358. 



California, Douglas ! — Plant slender, about 10 inches high. 



3. C. rmdtiglandulosa (DC. ! 1. c.) : stem scabrous-puberulent and sparse- 

 ly hispid ; leaves sparsely setose-hispid; the upper cauline tipped with a 

 subsessile gland ; the floral ones crowded or fascicled on the very numerous 

 and short axillary branchlets (which bear solitary heads), the back and mar- 

 gins above, as well as the apex, furnished with stipitate glands; scales of the 

 involucre and the united chaff of the receptacle acutish, beset with stipitate 

 glands; achenia glabrous; pappus of about 5 lanceolate subulate-awned 

 scales, and as many intermediate and shorter oblong and obtuse denticulate 

 scales. 



California, Douglas ! — Apparently the largest species ; 18 inches or more 

 in height. Cauline leaves 2 inches long. Rays short, very broad, convo- 

 lute, with a very short tube, deeply 3-lobed; the lobes mucronulate ; the 

 middle one much smaller than the others. 



4. C cephalotes (DC. ! 1. c.) : stem pubescent above ; the heads nearly 

 sessile and crowded at the summit, and sometimes solitary in the upper 

 axils; leaves long and very slender, nearly glabrous, sparsely hispid-ciliate 

 towards the base; the lower sometimes opposite ; the floral few, tipped with 

 a nearly sessile gland, and towards the summit furnished, as are the scales of 

 the involucre and the mucronate-acute united chaff of the receptacle, with 

 smaller scattered stipitate glands; achenia sparsely villous; pajjpus of 5 

 rigid lanceolate-subulate and somewhat awned scales, about two-thirds the 

 length of the corolla, and as many intermediate and shorter lanceolate-oblong 

 obtuse scales. 



California, Douglas!— V\z.ni slender, 6-10 inches high. Leaves linear 



VOL. II. — 51 



