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S Y N O P S IS OF T H E S P E C IE S OF C H E IL A N T H E S KNOWN
TO O C CU R IN T H E U N IT E D S T A T E S .
1
C he ilanth es, S w a r t z , Syn. F il, p . 5, 12 6 .
§1. A d ia n t o p s is . — Involucres separate, one to each fertile veinlet.
1 . C. Californica, M e t t e n iu s (California).
§2. E u c h e il a n t i -i e s . — Involucres more or less confluent, usually
extending over the apices of several veinlets, but not, or very rarely, continuous
all round the segment.
* Segments o f the fr o n d smooth.
2. C. Wrightii, H o o k e r (Texas to Arizona).
3 . C. microphylla, S w a r t z (New Mexico).
4 . C. Alabamensis, K u n z e (Carolina to Texas).
F ro n d somewhat hairy, or hairy and glandular, but not iomentose.
5 . C. leucopoda. L in k (Texas).
6. C. vestita, S w a r t z (New York to Georgia, Illinois, and
Kansas).
7. C. Cooperes, D. C. E a to n (California).
§3. P h v s a p t e r is or M v r io p t e r i s .— Ultimate segments minute, rounded
; involucre usually continuous all round the margin. Fronds, in all our
species, twice to thrice pinnate, with the lower surface tomentose or scaly,
the tomentum or scales at first white, often becoming tawny as the fronds
mature.
* F ron d tomentose beneath, but not scaly {except along the rachises in No. 11)