STUDIES IN THE COMPOSITA. 183 
5. M. FroRipANa. Cacalia Floridana, Gray, Proc. Am. 
Acad. xix. 52 (1883). Habitat of the preceding nearly, but 
more southerly, being known only from eastern Florida. 
6. M. PLANTAGINEA, Raf. New Flora, l. c. (1836). Arno- 
glossum plantagineum, Raf. Fl. Ludov. 65 (1817), probably. 
Cacalia tuberosa, Nutt. Gen. ii. 138 (1818). Senecio Nuttallii, 
Sch. Bip. in Flora, 1. c. (1845). Plant indigenous to almost 
the whole Mississippi Valley north and south, and there is 
scarcely room for doubt that it is the type of Rafinesque’s 
unluckily designated genus Arnoglossum. Indeed, his own 
employment of the specific name plantagineum for it, under 
Mesadenia can hardly be construed to mean less than this, 
that he recognized the identity of Robin’s plant with that 
which Nuttall had named Cacalia tuberosa; and he ex- 
pressly says that, of his M. plantaginea, C. tuberosa is & 
synonym. 
7. M. LANCEOLATA, Raf. New Flora,l.c. Cacalia lanceolata, 
Nutt. Gen. l.c. Species of wet pine barrens along the south- 
ern Atlantie seaboard. 
À 4. Four New Species. 
PYRROCOMA LoNGIFOLIA. Leaves almost all radical, sub- 
erect, thinnish, a foot long or more, narrowly oblanceolate, 
obtusish, entire, or callous-dentate, long-petiolate: stems 
several and subscapiform, little longer than the leaves and 
leafy-bracted, mostly monocephalous: involucre broadly 
turbinate or subcampanulate, ? in. high; bracts spatulate 
and oblanceolate, all with ample green-herbaceous tips and 
subequal, the outer quite as long as the inner: rays 30 or 
more. 
Mount Eden, Alameda Co., California, May, 1891, Bran- 
degee. A glabrous species, related to P. elata, but of very 
pronounced specifie characters; perhaps local. 
STE Se PIA SRI SF. Ss se a Oe 
25 Issued 20 July, 1897. 
