Variat foliis caulinis modo magis modo minus serratis, quandoque et subintegerrimis.
Senecio ceratophyllus, N. ab E.
S. foliis oblongis, inferioribus lyrato-pinnatipartitis superioribus pinnatipartitis petiolatis cauleque lanuginosis, laciniis acuminatis extrorsum inciso-dentatis, dentibus angustis, petiolis auriculatis amplexicaulibus, floribus umbellatis, pedunculis elongatis nudis.
On the Upper Missouri, June 13.
Nearly related to Senecio balsamitæ, but sufficiently different, as I was convinced by specimens which I received through Mr. Gray, from New York. The plant of the Missouri is much larger, 1½-2 feet high, entirely covered with loose downy hair. The lowest leaves are not entire, but lyrate and pinnatified below to the mid-rib, with a terminal lobe. The laciniæ and the terminal lobe have long, narrow, pointed teeth; the middle leaves are of the same shape; the ultimate lobe is, however, narrower, and shows the transition to the upper, entirely pinnatified leaves. The laciniæ of these upper leaves are nearly lanceolate, and have, above and below, two or three teeth, but at the middle only one or no tooth. The petiole is long, and the auricles distant from the lower laciniæ. In Senecio balsamitæ the cauline leaves are sessile; these too, have here, only blunt teeth; the receptacles are twice as large as in Senecio balsamitæ, and the scales of the involucrum are very pointed. In Senecio balsamitæ, on the contrary, they are much less pointed, and may often be designated as obtuse.
Artemisia Douglassiana, Bess. Abr. n. 39. Hook. Fl. Am. bor. p. 323. De C. Prodr. VI. p. 115, n. 118.
Erigeron sulcatus, N. ab. E. hirtus, caule sulcato corymboso-ramoso ramis foliosis unifloris, foliis lanceolato-linearibus integerrimis sessilibus, periclinii squamis hirsutissimis, ligulis angustis numerosissimis periclinio duplo longioribus (albis.) (Am. 8, Juni ♃.)
Differt ab Erigeronte pumilo, Nutt. caule fastigiatim ramoso stricto sulcato. An huius var. Pappus biserialis, seriei exterioris pilis brevibus.
Erigeron asperus, Var. caule unifloro. (Erigeron) asperum, Nutt. Gen. am. II. p. 147. De C. Prodr. VI. p. 286, n. 16.
Stenactis annua, var. obtusifolia.—Aster Novi Belgii, var. β squarrosus, N. ab E.—Aster bellidiflorus, var. β, N. ab E.