e, 
BOTANY. 111 
Banks of the Rio Grande, near Albuquerque; October. Stems 3 to 9 inches high, virgate. 
Leaves uniform from the base to the apex of the stem, an inch or an inch and a half long, 
rather crowded, almost filiform. Heads rather larger than those of G. uliginosum, densely 
congested into woolly capitate glomerules, one in each axil, and forming a long and virgate, 
interrupted, leafy spike. Flowers very numerous. Receptacle broad and flat. Involucre about 
the length of the disk. To this apparently well-marked species belongs a specimen gathered y 
Frémont, in his first expedition, on the Sweet-water of the Platte. Its strict and virga 
stems and inflorescence, and the very narrow leaves, distinguish it at once from G. uliginosum 
and any allied species. . 
SENECIO FILIFOLIUS, Nutt. var. Jamesin, Torr. de Gray, Fl. 2, p. 444; and var. FREMONTII, 
Torr. € Gray, l. c. Rocky hills of the Upper Canadian ; September. 
SENECIO LoNGILOBUS, Benth. Pl. Hartw. var. Rocky places, Hurrah Creek, New Mexico ; 
September. ; 
Senecio FENDLERI, Gray, Pl. Fendl. p. 108. Sandia mountains, New Mexico; October. 
The specimens exactly accord with those of Fendler's collection. 
SENECIO EREMOPHILUS, Richards.; Gray, Pl. Fendl. p. 108. Mountain arroyos, near Santa 
Antonita, New Mexico; October. M 
ENECIO EURYCEPHALUS, Torr. & Gray, Pl. Fendl. p. 109, var. MAJOR; foliis tantum pinnati- 
fidis, radicalibus superne integris inferne dentatis rariter laciniato-lobatis. On plains, near 
Murphy's, California; May. The heads and flowers accord with those of Frémont's and Hart- 
weg's specimens of S. eurycephalus; but the plant is larger, apparently 3 or 4 feet high; the 
cauline leaves are 6 to 9 inches long, lanceolate in outline, obtuse, laciniate-pinnatifid, with 
irregular and unequal oblong lobes; the radical leaves oblong or ovate-oblong, sparingly and 
irregularly pinnatifid only at the base. All these species may be expected to be polymorphous 
in foliage. . ; 
SENECIO EXALTATUS, Nutt.; Torr. € Gray, Fl. 2, p. 439. Hill-sides, near Downieville, Cali- 
fornia ; May. 
ENECIO EXALTATUS, Nutt., var. UNIFLOSCULUS. Hill- ides, Grass Valley, California; May. A 
slender form, and with a solitary ray, or sometimes perhaps rayless. 
ENECIO ARONICOIDES, DC. Prodr. 6, p. 426. Hills, near San Francisco and Punta de los 
Reyes; April. Also, with slightly-toothed leaves and few heads, Duffield's Ranch, in the Sierra 
Nevada ; May. 
SENECIO CALIFORNICUS, DC. l. c., var. foliis caulinis laciniato-pinnatifidis. Cocomungo, Cali- 
fornia, in sandy plains; March. This appears to differ from S. Californicus, $. DC., only in 
the laciniate-pinnatifid or toothed leaves. The heads are larger than in Nuttall's S. Coronopus. 
Senecio BreELovir (sp. nov.): glabra; caule simplici e radice perenni apice racemoso-3-15- 
cephalo foliis ovato-lanceolatis acuminatis argute calloso-dentatis in petiolum longum margi- 
natum contractis, supremis lanceolatis basi augusta semiamplexicaulibus; capitulis magnis 
nutantibus homogamis ; involucro late campanulato 10—12-phyllo basi bracteolis paucis brevibus 
setaceis calyculato, squamis acutis equalibus, exterioribus lanceolatis, interioribus latioribus 
Scarioso-marginatis; ligulis nullis; acheniis glaberrimis. In mountain arroyos, near Camp 
Douglas, New Mexico; October. Plant entirely glabrous. Stem rather stout, erect, 18 inches 
to 2 feet or more in height, rather leafy to the top; the uppermost leaves reduced to bracts. 
Lower leaves 3 to 5 inches long, abruptly contracted at the base into a margined or winged 
petiole of 2 or 3 inches in length ; the upper successively narrower and with shorter petioles, or 
at length sessile. Heads racemose, nodding on the summit of erect and naked or slightly 
bracteolate peduncles of 1j to 3 inches in length, very large for a Senecio, from half to three 
quarters of an inch in length and breadth, many-flowered. Involucre rather fleshy, a little 
shorter than the flowers, very minutely bracteolate ; the scales 5 or 6 lines long, herbaceous, 
with abrupt hyaline-scarious margins, which on the alternate and interior scales are broad and 
