64 PROCEEDINGS OF THE AMERICAN ACADEMY 



MiCROSERis, Don. There are a few changes and one or two 

 additions to be made in this genus. In the section Scorzonella they 

 relate wholly to the typical group, the forms of which, although they 

 closely approach, may be distinguished as follows : — 



MicuosKUis rROCKRA is tall and robust, has the largest heads of 

 all and the broadest leaves (excluding a large form of the next which 

 has been confounded with it), the papi^us-paleaj are found to be lanceo- 

 late (either narrowly or broadly), acute, and about one fourth the 

 length of the awn. It is restricted to N. W. California and adjacent 

 Oregon, is Calais glauca var. procera in Proc. Am. Acad, vii, 364, 

 a specific name which is not kept up under Microseris because it is 

 very doubtful if it can be Ilymenonema glaucum of Hooker, and it is 

 M. laclniata var. procera, Gray, Proc. Am. Acad. ix. 209. 



MiCROSKRis LACixiATA, Gray, 1. c, chiefly of the lower Columbia 

 River, has smaller heads, less robust habit, shorter akenes, and jiappus- 

 paleai deltoid or triangular-ovate, not longer than the breadth of the 

 akene at summit, and abruptly tipped by an awn of 7 to 9 times its 

 lenjith. 



Microseris leptosepala {Scorzonella Irptosrpala, Nutt.), from 

 the Columbia River above the Cascades, is slender, with smaller and 

 fewer-flowered heads ; the involucre (only half-inch high) of fewer 

 t)racts, almost in two series, the inner wholly lanceolate-attenuate ; 

 palea3 of the pappus (often only 8) about a fourth or fifth of the length 

 of the rather slender akene, ovate-lanceolate or narrower, and taper- 

 ing gradually from the base upward into the awn. Ht/meiionema 

 glaucum, Hook., only slightly characterized from an incomplete speci- 

 men, is pi'obably a narrow-leaved form of this or of the preceding. 



MiCKOSEKis BoLANDERi. Calais Bolanderi, Gray, Proc. Am. 

 Acad. vii. 365, of N. W. California, was wrongly referred to and con- 

 founded with the preceding species in Proc. Am. Acad. ix. 209, and 

 Botany of California. It has rather larger heads, mainly narrow 

 involucrai bracts, or the broader outermost small, and pappus-paleaj 

 little exceeding the breadth of the akene, broadly ovate, mostly obtuse 

 or retuse, and abruptly tipped by the slender awn. 



§ Calais includes in the Calocalais subdivision the very long-awned 

 M. macrochceta, not yet sufficiently known ; also the short-awned old 

 species, 31. linearifolia and M. Lindleyi, and a new species, 31. 

 acuminata of Greene, which is Calais Douglasii, Gray, Pacif. R. 

 Rep. iv. 113, not of DC. The species with subclavate to turbinate 

 akenes are 31. aplmntocarpha, with its var. ienella, and a var. palealis, 

 which shows a tendency to pass into 31. Bigclovii. The Eucalais 



