four-o'clock family 455 



(1909), type loc. Mendocino, Brown 833. A. neurophylla Stand. 1. c. 314, pi. 32, tj-pe loc. San 

 Nicolas Island, Trask 23, is a larger, stouter plant than A. unibellata with thicker fleshy leaves 

 and thicker bracts, ex. char.; fruit unknown. 



4. A. alba Eastw. Similar to A. umbellata ; leaves orbicular to elliptical 

 or obloiig, often wavy-sinuate; bracts narrowly ovate, acuminate; tiowers 

 white; fruit glabrous or nearly so, its body smaller and whiter than in A. 

 umbellata, its wings thin but firm, broader below than in that species and 

 somewhat prolonged above the body as rounded lobes. 



San Nicolas Island. On the mainland represented by varieties which are 

 scarcely separable from the species; the first varietj' evidently passes into 

 A. umbellata on the Santa Barbara coast. 



Var. platyphylla Jepson n. comb. Leaves mostly rather broad, wavy-sinuate; flowers 

 pinkish or reddish ; fruit wings ehartaceous. — Seacoast, San Diego to San Luis Obispo Co., 

 and perhaps north to Monterey. Var. variabilis Jepson n. comb. Internodes elongated; 

 leaves few, small, irregularly rhomboidal to oblong; flowers as in preceding; wings mem- 

 branous. — San Diego to San Luis Obispo Co. 



Kefs. — Abkonia alba Eastw. Proc. Cal. Acad. ser. 3. 1 : 97 (1898), type loe. San Nicolas 

 Island, Blanche Trask. Var. platyphylla .lepson. A. platiiphylla Stand. Contrib. U. S. Nat. 

 Herb. 12: 314, pi. 33 (1909), type loc. Del Mar, San Diego Co., T. Braiidegee. Var. variabilis 

 Jepson. A. variabilis Stand. 1. c. 314. pi. 31, fig. 1, type loc. Redondo, Braunton 2.58. A. minor 

 Stand. 1. c. 313, pi. 29, fig. 2, type loc. McGinnis, n. San Luis Obispo Co., Palmer 521; wings 

 thin and soft, those of the outer fruits very narrow, widest in the middle and narrowed above 

 and below ; not seen by us, but ex. char., seems near var. variabilis. 



5. A. villosa Wats. Stems trailing, i/o to 1 foot long; herbage glandular- 

 villous or the blades subglabrous; leaves ovate to elliptic, a little wavy-mar- 

 gined, % to 11/4 inches long; bracts narrowly lanceolate, acuminate, 3 to 5 

 lines long, scarious ; flowers rose-purple, 5 to 8 lines long ; fruit 3 lines long 

 and 4 or 5 lines broad, 5-winged. the thin wings obliquely widened upward 

 and forming broad diverging lobes more or less auriculatel.v produced be- 

 yond the body; body reticulate-honeycombed; beak slender, often prominent. 



Southern California, east to Arizona and Utah. 



Locs. — San Luis Obispo, ace. Standley ; Ash Hill. Mohave Desert, Hall 6101; Barstow, 

 K. Brandegee (wings submembranous) ; Kramer, K. Brandegee (the specimens show wingless 

 fruits on same plants with the usual winged fruits) ; San Felipe, Colorado Desert, Stephens; 

 Anaheim, ace. Standley; Carrizo Creek, T. Brandegee. 



Var. aurita Jepson n. comb. Body less reticulate or scarcely at all so ; 

 flowers 8 to 13 lines long; does not seem to difl'er essentially otherwise. — 

 San Jacinto, Jepson 1245 ; San Felipe, T. Brandegee; Calexieo, ace. Parish in 

 herb. 



Eefs. — Abronia villosa Wats. Am. Nat. 7: 302 (1873), type from Ariz., Wheeler. Var. 

 aurita Jepson. A. aurita Abrams, Bull. Torr. Club. 32: 537 (1905). type loc. Palm Sprs., 

 Parish 4138. A. pinetorum Abrams, Bull. Torr. Club, 32: 537 (1905), type loc. Thomas 

 Valley, San Jacinto Mts., Hall 2166; leaves smaller; fruit pink; otherwise essentially like var. 

 aurita. 



6. A. pogonantha Heimerl. Stems trailing, 10 to 12 inches long; herbage 

 glandular short-villous or the blades nearly glabrous; leaves ovate or broadly 

 oblong to oblong-lanceolate. 1 to 2 inches long; bracts ovate, acute or acumi- 

 nate. 3 lines long; calyx pale or lavender white, or purple. S lines long; fruit 

 commonly 2-winged, rarely with a third smaller wing, rouud-obcordate with 

 a somewhat squarish notch at summit, 2 to 3 lines long and as broad, the body 

 and wings reticulate. 



Mohave Desert, north to the San- Carlos Range and to Inyo Co. 



Locs. — San Carlos Creek, Jepson 2738; Kramer. Jepson 5332; Lancaster, K. Brandegee; 

 Antelope Valley, Davy 2214; Olancha, Hall 4'- ChandUr 734S. 



Refs. — Abronia pogonantha Heimerl, Engler, Bot. Jalirb. 11: 87, pi. 2, fig. 4 (1889), type 

 loc. Hesperia, Parish 1345. A. angulata Jones, Contrib. 8: 39 (1898), type loe. Darwin Mesa, 

 Argus Mts., Jones. 



7. A. turbinata Torr. Annual ; stems ascending or suberect, puberulent ; 

 leaves round-ovate to elliptical, glabrous, bright green, 1,4 to l^o inches long; 



