four-o'clock family 457 



1% inches long, shortly petioled; flowers white to rose-color, 3 to 4 lines long; 

 fruit 2 lines long, its inflexed margin 2 or 3-toothed. 



Caiions on the western border of the Colorado Desert. East to Utah and 

 Texas, south to Chile. 



Var. VILLOSA Coekerell. Stems villous pubescent. — Providence Mts., T. Brandepee. Var. 

 NUDATA Coclserell. Upper internocles long and upper leaves somewhat reduced. — Palm Caiion, 

 Hall 1S72; Coaehella, Eall 5808; Chuckawalla Wash, Schellenger 101; Ash Hill, Mohave 

 Desert, Hall 6102. 



Refs. — Wedeliella incarnata Coekerell, Torreya, 9: 167 (1909). TVedelia incarnata 

 Kuntze, Rev. Gen. PI. 533 (1891). Allionia incarnata L. Syst. ed. 10, 890 (1759), type loc. 

 Cumana, Venezuela. Var. villosa Coekerell, 1. c. H'ecltlia incarnata subsp. villosa Stand. 

 Contrib. U. S. Nat. Herb. 12: 333 (1909), type from Ariz., Fringle. Var. nud.vta Coekerell, 

 1. e. Wedelia incarnata subsp. nudata Stand. 1. c, 334, type loc. Coyote Canon, Hall 1872. 



6. ALLIONIA Loefl. Umbrella-wort. 



Perennial herbs. Leaves slightly fleshy. Involucres 5-lobed, in fruit en- 

 larged and membranous or reticulate-veined, 1 to 5-flowered. Flowers red 

 to purplish or white. Calyx campanulate or funnelform. Stamens 3 to 5, 

 unequal ; filaments united at base. Fruit clavate, 5-angled or 5-ribbed. — 

 Species about 60, southwestern United States to Chile. (Chas. AUioni, 1725- 

 1804, Italian botanist.) 



1. A. brandegei Stand. Stems erect or spreading, 4 to 7 inches high, from 

 a thick woody root; herbage viscid pubescent or nearly glabrous; leaves 

 broadly lanceolate, ^4 to 114 inches long, shortly petioled; involucres one to 

 an axil, shortly peduncled ; flowers unknown; truit with 4 or 5 low more or 

 less tuberculate ribs, 3 lines long, pubescent. 



Eastern Mohave Desert to southern Nevada. 



Ref. — Allionia brandegei Stand. Contrib. U. S. Nat. Herb. 12: 346 (1909), type loc. 

 Providence Mts., T. Brandegee. 



7. MIRABILIS L. 



Perennial herbs. Flowers 1 to several in a 5-lobed calyx-like involucre. 

 Involucres mostly campanulate, axillary or terminal, borne on shoi-t peduncles 

 and in clusters or solitary. Calyx campanulate to funnelform, white or red. 

 Stamens usually 5. Fruit narrowly ellipsoidal to globose, not angled or 

 ribbed, or rarely so, mostly smooth, glabrous. (Latin mirabilis, wonderful.) 

 Flowers several in an involucre; calyx funnelform; stamens united at base. — Subgenus 

 Quamoclidion. 



Fruit 5-angled, tuberculate 1. M. greenei. 



Fruit not angled, 10-striate, not tuberculate 2. M. froebellii. 



Flowers solitary in each involucre; calyx campanulate; stamens distinct; fruit smooth. — Sub- 

 genus Hesperonia. 



Involucral lobes linear or lanceolate, 1 to 2 times as long as tube 3. M. tenuiloba. 



Involueral lobes short-ovate to short-lanceolate, % to as long as tube. . .4. M. calif ornica. 



1. M. greenei Wats. Stems several from a perennial root, once or twice 

 forked, 1 to 2 feet high ; herbage minutely glandular-puberulent ; leaves ovate, 

 acute, liy-o to 21/^ inches long, shortly petioled ; involucres 7 to 10-flowered, 

 1 to 11/4 inches high, campanulate, shortly lobed, the lobes broad, acute at 

 apex; calyx greenish purple, tubular-funnelform, li/o inches long; fruit "5- 

 angled," longitudinally ridged, more or less tuberculate. 



Northern California: Tehama Co. north to Siskiyou Co. May. 



Locs.— Hornbrook, Howell 1386; Yreka, Butler 774; Shasta Valley, Butler 1334; Cold Fork, 

 Yollo BoUy foothills, Jepson. 



Refs.— Mirabilis greenei Wats. Proc. Am. Acad. 12: 253 (1877), type loc. Yreka, Greene. 

 Quamoclidion greenei Stand. Contrib. U. S. Nat. Herb. 12: 358 (1909). 



2. M. froebellii Greene. Stems stout, many from a perennial root, forking 

 and diffusely spreading and so forming circular plants 1 to 3 feet broad; 

 herbage glandular-pubescent; leaves broadly ovate, 1^4 to 4 inches long, often 

 broader than long, subcordate at base, acutish or obtuse at apex; petioles 



