426 COMPOSITE. Microseris. 



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 Bigelovii, Gray in Pacif. R. 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 2 lines long, rather turbinate : pappus 3 to 5 lines long. 



9. M. Douglasii, Gray, 1. c. Between the last and the next : akenes 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 3 lines long, in shape most like those of the section Culocalais. 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. 



-t- +- 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. Rep. iv. 

 115, t. 18. 



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

 scales conspicuously silky-villons externally. C. eriocarpha, Gray, Proc. Am. 

 Acad. vi. 552. 



Grassy plains and hillsides, Napa Valley (Bigelmv), 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. eriocarpha : this collected at Nipoma (Brewer) and on Monte Diablo, Bloomer. The larger 

 heads three quarters of an inch high. Akenes 2J 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 Rey, 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, fusiform, tapering gradually upwards into a narroiv neck or even 

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

 exterior ones unequal and less distinctly cali/culate : 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 (?). 

 CALOCALAIS, Gray. (Calais Calocalais, DC.) 



* Scales of the pappus only 5, lanceolate or oblong, abruptly awned from a notch 

 caused by the early splitting of the apex of the scale : leaves linear, mostly 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, oblong-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. 



