STANDLEY—ALLIONIACEAR OF THE UNITED STATES. 387 
23a. Boerhaavia linearifolia glandulosa Standley, subsp. nov. 
Perennial from a woody root; stems prostrate, branched, spreading, glandu- 
lar-pubescent below, glandular above; leaves lanceolate, thin, green on both 
surfaces, black-dotted below, short-petioled; flowers larger than those of B. 
lincarifolia or B, tenuifolia, stamens 3. 
Type in the herbarium of the Missouri Botanical Garden, collected in Texas 
by Lindheimer in 1846, no. 510, as well as several other numbers of various 
years’ collections. Also collected in southwestern Texas by Reverchon (no. 
126). This is the only form belonging to this group that I have seen with 
glandular hairs on the lower part of the stem; the plant, too, is larger and 
more robust than the species; it may be specifically distinct. 
The writer has seen representatives of all of the North American species 
of Boerhaavia except the following: 
BoERHAAVIA PALMERI 8S. Wats. Proc. Am, Acad. 24: 69. 1889. 
Type locality, “ Dry sandy soil near Guaymas” (Mexico). 
Collected 1887, Palmer 6838. 
BoERHAAVIA ALAMOSANA Rose, Contr, Nat. Herb. 1:110. 1891. 
Type locality, ‘ Hillside about Alamos” (Mexico). 
Collected 1890, Palmer 714. 
BoERHAAVIA SONORAE Rose, Contr. Nat. Herb. 1: 110. 1891. 
Type locality, “Along watercourses near Alamos.” 
Collected 1890, Palmer 715. 
16. SELINOCARPUS A. Gray. 
Selinocarpus A, Gray, Am. Journ, Sci. II. 15: 262. 1853. 
Perennial herbs or sometimes somewhat shrubby plants, ascending, erect, 
or prostrate; leaves opposite, often unequal, sessile or petioled, entire, thick 
and sometimes fleshy; flowers solitary in the axils of the leaves or clustered 
at the ends of the branches; bracts when present, small and inconspicuous; 
calyx funnelform, with a short and thick or long and slender tube which ex- 
pands into a spreading limb; stamens 2 to 5, exserted; fruit with 3 to 5 prom- 
inent, membranous wings. 
KEY TO THE SPECIES, 
Flowers 10 mm. or less in length, with scarcely any 
tube. 
Leaves linear or very narrowly elliptical_____--- 5. S. angustifolius. 
Leaves broadly ovate_---- woe eee + 6. S. chenopodioides. 
Flowers 15 mm. or more in length, with a conspicuous 
tube (the flowers sometimes cleistogamous). 
Leaves linear or very narrowly elliptical___-~-—-- 1. S. palmeri. 
Leaves neither linear nor very narrowly elliptical. 
Leaves lanceolate, very thick and fleshy_-——- 2. S. lanceolatus. 
Leaves mostly ovate, not fleshy. 
Upper leaves mostly small and bract-like, 
scattered; stems much branched, 50 cm. 
or less in height. -.------------------- 3. S. parvifolius, 
Upper leaves not reduced; stems rather 
densely leafy, less branched, and lower. 4. S. diffusus. 
> 
1. Selinocarpus lanceolatus Wooton, Bull. Torr. Club 25: 304. 1898. 
Specimens examined: 
New Mexico: White Sands, 1897, Wooton 389, type; near El Rito, 1880, 
Rusby 857; White Sands, 1899, Wooton; near Suwanee, 1906, Wooton. 
