NEW OR CRITICAL SPECIES OF ACER. 9 
not unite this and the preceding as forms of one species on 
account of the marked differences in the achenes, though as to 
pappus they are quite alike. But the two are different habitally ; 
and the geographical reason for holding them apart is cogent. 
The Santa Lucia Mountains, and the foothills of the Sierra 
Nevada opposite are two very distinct climatic regions. Mr. 
Parish’s n. 1902, as in my herbarium, seems to represent M. 
prozima south of the Tehachapi Divide. It is from Elizabeth 
Lake, Los Angeles Co. Its pappus is rather more elongated 
than in the type specimens, but it does not otherwise differ. 
M. FURFURACEA. Low, the many decumbent-scapes only 3 or 
4 inches high and almost equalled by the loosely pinnatisect 
leaves, the whole plant, even to the involucres furfuraceous 
and also somewhat villous-hairy: involucres round-ovate 
achenes less than 2 lines long, nearly columnar, the outer some- 
what shorter, white-villous in lines between the ribs, the others 
brownish, their ribs minutely and closely scabrous-serrulate ; 
pappus of very short deltoid-ovate white glabrous paleæ broader 
than long, the slender fragile awn more than twice as long, the 
whole as long as the achene. 
Only a single but excellent specimen, collected by the writer 
near Midway, Alameda Co., Calif., 3 May, 1895. The species 
may perhaps better stand in another group, near M. aphanto- 
carpha ; but the paleæ if not cymbiform are evidently concave. 
M. oLIGANTHA. Plants small, the leaves mostly narrowly 
oblanceolate, obtuse and entire or sparingly toothed, some 
broader and more or less pinnatifid: scapes usually solitary, 
3 to 6 inches high, decumbent: involucre cylindraceous, very 
few-flowered : achenes all very light-colored, the outer lightly 
villous, the inner with ribs very minutely and obscurely scab- 
rous-serrulate, all about 2 lines long and linear-fusiform; pap- 
pus of short ovate glabrous white-palee and awn about twice 
as long. 
Near Ashland, Oregon, April, 1889, d'homes Howell, distri- 
buted for M. Douglasii. I have little doubt that a similar plant 
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