290 PROCEEDINGS OF THE AMERICAN ACADEMY. 
rotund with a longitudinal hilar ridge on the ventral surface, scrobicu- 
ate. — Proc. Am. Acad. xvii. 202. — Northern Mexico, Coahuila, in 
the region of Saltillo, Palmer, nos. 397, 398, and in the same State on 
limestone hills, Carneros Pass, Pringle, no. 2381. 
++ ++ Leaves much reduced: capsule about 2 mm. long. 
H. longipes, Watson. Erect, much branched, 1 to 2} dm. high: 
stems and branches subterete, slender, glabrous or below granular-hirtel- 
lous: leaves linear-filiform, 4 to 10 mm. long, glabrous ; stipules minute: 
flowers small, “ whitish and yellowish,” 8 mm. long, on slender filiform 
pedicels: calyx-divisions linear, about 1 mm. long, obtusish and submu- 
cronate: corolla funnelform, upper portion of tube pubescent within ; 
lobes pilose-pubescent above: capsule small, subrotund; seeds saucer-like 
or subcrateriform with a longitudinal ridge on the hilar surface, scrobic- 
ulate. — Proc, Am. Acad. xviii. 97. — Near Monclova, Coahuila, Palmer, 
no. 394, and by the same collector at Monterey, Nueva Leon, no. 395; 
also by Dr. Gregg at Cerralbo, collected 29 May, 1847. 
H. brevipes, Rose. A low much branched distinctly suffrutescent 
plant, 2 to 3 dm. high, glabrous throughout, somewhat glaucous: branches 
slender, terete: leaves linear-filiform, 10 to 15 mm. long; stipules short, 
1—4-setiform: flowers sessile or on slender pedicels: calyx deeply 4- 
lobed, with a stipitate gland in each sinus: divisions in anthesis about 
1 mm. long: corolla salverform, 10 to 15 mm. long ; tube slender, slightly 
enlarged above; lobes glabrous above : capsule subglobose ; seeds oblong, 
peltate, cancavo-convex, minutely scrobiculate. — Contrib. U. S. Nat 
Herb. i. 83, 132. — Lower California, Santa Rosalia, Palmer, no. 202; 
Carmen Island, Palmer, no. 836; also specimen in Gray Herbarium from 
Lower California, apparently from the herbarium of Dewey, without 
further data. 
§ 2. Erercoris. Fruticose or fruticulose plants with linear subterete 
rigid-setaceous or acerose-linear leaves: capsule short-oblong, obtuse or 
retuse ; seeds open-crateriform or oblong, peltate, minutely scrobiculate. — 
Gray, Proc. Am. Acad. xvii. 203. 
* Low, 2 to 18 cm. high, much branched from a 
rigid-setaceous or acerose-linear. 
H. acerosa, Gray. A low diminutive cespitose shrub: branches as- 
cending or erect, strict, striate, hispidulous: leaves opposite or in threes 
or fours, 5 to 12 mm. long, connected at the base by a stipular setiferous 
~ eup, more or less hispid and ciliate: flowers sessile at the ends of the 
branches and branchlets: calyx deeply 4-parted; divisions setaceous, 
4 mm. Tong, hispidulous : corolla-tube slender, about 1 cm. long, dilated 
woody perennial base: leaves 
