426 COMPOSITE. Atkroseris. 



lucre rather numerous and of two lengths : akenes short and not at all narrowed at 

 the summit : scales of the pappus naked or minutely scabrous externally, varying 

 from ovate-lanceolate to oblong-lanceolate, and tapering gradually into a slender 

 longer awn. — Calais Bvjelovii, Gray in Pacif. II. Rep. iv. 113, t. 17. C. Doug- 

 lasii, Gray, 1. c. & Bot. Mex. Bound. 164, not of DC. 



Moist places, common especially about the Bay of San Francisco. Head half an inch high. 

 Akenes 2 or at most 'Ih lines long, rather turbinate : pappus 3 to 5 lines long. 



9. M. Douglasii, Gray, J., c. Between the last and the next : al^enes more 

 slender, fusiform, tapering toward the summit almost as much as toward the base : 

 scales of the pappus silky-villous externally, of firmer texture, ovate-oblong and more 

 or less tapering into a rather stout long awn. — Calais Douglasii, DC. Prodr. vii. 

 85 ; Hook. & Arn. Bot. Beechey, 361. 



California, probably near Monterey, Douglas. As yet known only from his specimens. Akenes 

 3 to Si lines long, in shape most like those of the section Calocalais. Pappus including the awn 

 fully 5 lines long ; its scales resembling those of the next species in texture, but narrower and 

 acute :,the akenes very different from those of the next or of the preceding species. But the 

 plant is too little known. 



-i- -f- Pappus-scales orbicular or very broadly ovate, and obtuse or retuse at the apex, 

 abruptly awned : akenes thick, slightly or not at all constricted under the broad 

 apex. 



10. M. cyclocarpha, Gray, 1. c. Like larger forms of M. Bigelovii : awns of 

 the pappus slender, twice or thrice the length of the ample and (in the typical form) 

 mostly glabrous and smooth scales. — Calais cyclocarpha, Gray in Pacif. R. Eej). iv. 

 115, t. 18. 



Var. eriocarpha, Gray, 1. c. Awns of the pappus rather shorter, and its 

 scales conspicuously silky-villous externally. — C. eriocarplm, Gray, Proc. Am. 

 Acad. vi. 552. 



Grassy plains and hillsides, Napa Valley {BigcIovS), and Humboldt Co. {Kellogg) ; the latter 

 showing a few long loose hairs on the back of the pappus-scales, which suggest the union of the 

 var. eriocarxilia, : this collected at Nipoma {Brewer) and on Monte Diablo, Bloomer. The larger 

 heads three quarters of an inch high. Akenes 2i to 3 lines long ; and the pappus-scales some- 

 times nearly 2 lines in length, slightly erose-denticulate at the broad summit, more or less invo- 

 lute when dry. 



11. M. platycarpha, Gray, 1. c. Resembles the preceding: awns of the pap- 

 pus only about one third of the length of the broad round scale : young akenes not 

 contracted under the summit. — Calais platycarpha, Gray, 1. c. 



San Luis Eey, on clay hills, Parry. Known only in a single specimen, without full-grown 

 akenes. Scales of the pappus nearly smooth, almost 3 lines long and fully 2 lines broad. 



§ 4. Pappus not plumose, of 5 or rarely more awned chaffy scales : akenes long and 

 slender, ftisiform, tapering gradttally upxvards into a narroiv neck or even 

 beak : involucre cylindraceous or campamdate, of lanceolate scales, the few 

 exterior ones uneqtial and less distinctly calyculate : stem very short, branching 

 and leafy at the base, and sending up simple scape-like peduncles : corollas 

 very short, apparently transiently expanded^ at evening or morning (I). — 

 Calocalais, Gray. {Calais § Calocalais, DC.) 



* Scales of the pappus only 5, lanceolate or ohhng, ahrxiptly awned from a notch 

 caused by the early splitting of the apex of the scale : leaves linear, 7nostly narrow, 

 either laciniate-pinnatifid or entire : root annual, slender. 



12. M. Lindleyi, Gray, 1. c. A span or two high : pappus rusty-brownish ; its 

 scales about the length of the beakless but somewhat contracted akene, scabrous- 

 puberulent externally, olilong-lanceolate, their midrib continued beyond the (at first 

 shallow) notch into a rather stout scabrous awn of nearly its own length. — Calais 

 Lindleyi, DC, 1. c. 



