BOTANY. 
Ill 
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 by 
Fremont, in his first expedition, on the Sweet-water of the Platte. Its strict and virgate 
stems and inflorescence, and the very narrow leaves, distinguish it at once from G. uliginosum 
and any allied species. 
Senecio filifolius, Nutt. var. Jamesii, Torr. & Gray , FI. 2, p. 444 ; and var. Fremontii, 
Torr. & Gray , l. c. Rocky hills of the Upper Canadian ; September. 
Senecio longilobus, Benth. PI. Hartw. var. Rocky places, Hurrah Creek, Hew Mexico; 
September. 
Senecio Fendleri, Gray, PI. Fendl. p. 108. Sandia mountains, Hew Mexico; October. 
The specimens exactly accord with those of Fendler’s collection. 
Senecio eremophilus, Richards.; Gray, PI. Fendl. p. 108. Mountain arroyos, near Santa 
Antonita, Hew Mexico ; October. 
Senecio eurycephalus, Torr. & Gray, PI. Fendl. p. 109, var. major ; foliis tantuin pinnati- 
fidis, radicalihus superne integris inferne dentatis rariter laciniato-lohatis. On plains, near 
Murphy’s, California ; May. The heads and flowers accord with those of Fremont’s and Hart- 
weg’s specimens of S. eurycephalus ; hut 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 he expected to he polymorphous 
in foliage. 
Senecio exaltatus, Nutt.; Torr. & Gray, FI. 2, p. 439. Hill-sides, near Downieville, Cali¬ 
fornia ; May. 
Senecio exaltatus, Hutt., var. uniflosculus. Hill- ides, Grass Valley, California ; May. A 
slender form, and with a solitary ray, or sometimes perhaps rayless. 
Senecio aronicoides, DC. Prodr 6, p. 426. Hills, near San Francisco and Punta de los 
Reyes; April. Also, with slightly-toothed leaves and few heads, DufAeld’s Ranch, in the Sierra 
Hevada; May. 
Senecio Californicus, DC. 1. 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 Huttall’s S. Coronopus. 
Senecio Bigelovii (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 hasi augusta semiamplexicaulibus ; capitulis magnis 
nutantibus liomogamis ; involucro late campanulato 10-12-phyllo basi bracteolis paucis brevibus 
setaceis calyculato, squamis acutis mqualibus, exterioribus lanceolatis, interioribus latioribus 
scarioso-marginatis ; ligulis null is ; acheniis glaberrimis. In mountain arroyos, near Camp 
Douglas, Hew 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 
hracteolate peduncles of 1^ 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 hracteolate ; the scales 5 or 6 lines long, herbaceous, 
with abrupt hyaline-scarious margins, which on the alternate and interior scales are broad and 
