a 
ROBINSON. — SYNOPSIS OF THE GENUS MELAMPODIUM. 457 
7 3. M. Loneicornu, Gray, Mem. Am. Acad. v. 321 (Pl. Thurb.), 
1854, where by misprint longicorne. —S. Arizona, near Ft. Huachuca, 
Lemmon, no. 2777; Sonora, Santa Cruz, Thurber, no. 937 (type) ; Chi- 
huahua, near the city, Pringle, no. 10; San Luis Potosi, P Parry & Palmer, 
no. 443}. 
++ + Ligules longer, exceeding the involucral bracts, conspicuous: peduncles 
mostly long. 
= Soft-stemmed, strictly herbaceous and annual. 
a. Pubescence _ scanty: leaves oblong to linear, entire: 7 li of the 
hood long: involucre gamophyllous about to the middle 
~ 4, M. appendiculatum. Slender, erect, sparingly pubescent an- 
nual, 3 to 4 or more dm. high, branched almost from the base: leaves 
thin, oblong to linear, attenuate at the apex, scarcely narrowed to the 
Sessile subauriculate base: obsoletely serrate to quite entire, the larger 
ones (near the middle of the stem) 5 em. long, 1 cm. broad: pedun- 
cles 2 to7 cm. long, erect, slender: involucre saucer-shaped or shal- 
lowly cup-shaped, gamophyllous, the limb shallowly 5-lobed; the lobes 
rounded or barely and very obtusely pointed, their margins scarious: 
pubescence of the peduncles and involucres short and sparing: rays 
8 to 10, oblong, yellow, 6 mm. in length, 2-3-toothed at the apex; fruit 
tuberculate, the conspicuous appendage a linear coiled awn from an 
ovate-lanceolate somewhat 2-toothed base: pales scarious. — South- 
western Chihuahua, Dr. Edward Palmer, no. 245 (collection of 1885). 
Type in herb. Gray. This species has the outer involucre of JZ 
cupulatum, Gray, and the fruit of M. longicornu, Gray, yet it is 
clearly distinct from both, differing from the former not only in its long 
peduncles and well-developed ligules, but in stature and in the size of the 
leaves, and from the latter in the presence of a hood and appendage 
(both — lacking in J. cupulatum) and in the subauriculate base of 
the lea 
Var. ieiocaebik Similar in all points but the fruit smooth, striate, 
glandular-punctate, not at all tuberculate. — Collected by Dr. Edward 
Palmer at Alamos, 16-30 September, 1890, no. 726. Type in herb. 
ray. 
Var. sonorense. Involucre deeper, subcampanulate: fruit slightly 
roughened: otherwise like the type. — Collected by C. V. Hartman at 
Cochuto, Sonora, 2 October, 1890, no. 71. Type in herb. Gray. 
b. Pubescence yee oo stiff: leaves lanceolate, ee Bona hooded, but 
appendage shorter or sometimes obso 
- 3. M. sinks. Decumbent or suberect, ‘pene from near the 
base; stems dark purple, covered with stiff white somewhat reflexed 
