NOTES ON MACHJERANTHERA. 25 
M.oxvLEPIs. Perennial, a foot high or more, the long 
leafy stems erect, terminating in mostly a single large head, 
both stem and narrow entire ascending leaves canescently 
tomentulose, devoid of glands and with no scabrousness: 
bracts of the hemispherical involucre in about 5 series, 
merely tomentulose, closely imbricated and rigidly erect, 
the short green tips acute and those of the inner pungent: 
rays 15 or 20, large and showy. ; 
Southern Arizona, at Apache Pass, J. G. Lemmon, Sept., 
M. RIGIDA. Root and basal leaves not known, the stout 
rigid somewhat fastigiately panicled stem probably 2 or 3 
feet high ; the whole herbage pale with a minute scabrous 
pubescence intermixed with small resin glands: leaves 
linear-lanceolate and with a few pairs of short stout divari- 
cate spinescent teeth: involucres very numerous and small, 
campanulate, their acute erect herbaceous-tipped bracts nar- 
row and in about 5 series: rays small, narrow, rather nu- 
merous, but pale and inconspicuous. 
Collected at Kearn’s Cafion, Arizona, by Miss Zuck, and 
communicated by Prof. Toumey. A coarse unattractive 
member of the genus, with heads as small as those of M. 
parviflora, though with twice as many bracts to the involu- 
cre, and these less herbaceous. 
EARLY Spreciric Types IN CHAMACRISTA. 
My paper on CHamacrista published somewhat more 
than a year since! was mainly the result of field study, and 
was designed to exhibit, and to emphasize the taxonomic 
importance of, those very notable peculiarities of floral strue- 
ture of which I seemed to have been the discoverer. 
1 PrrTONIA iii. 238. 
Prrroxia, Vol. IV. Pages 25-40. 17 March, 1899. 
