272 ONAGRACEAE. 



2. L. adsurgens Greene. Stoloniferous perennial; branches 5-angled, de- 

 cumbent or assurgent, 1 to 3 ft. long; herbage pallid, slightly succulent; calyx 

 cylindric, 2% lines long, 12-ribbed, the ribs in maturity widening and thick- 

 ened below; accessory teeth minute, subulate; petals pale purple or almost 

 white, minute. 



Low wet places at West Berkeley and in Santa Clara Co. (Muhl. iii, 76.) 

 Perhaps a robust perennial variety of the next. 



3. L. hyssopifolia L. Annual ; stems slender and simple or with several 

 branches from below the middle, 4 to 9 in. high; herbage pale, glabrous; 

 leaves linear or oblong, 3 to 7 lines long; flowers subsessile in the axils; calyx 

 cylindric, 2 lines long; petals 1 line long or less, pale purple or whitish. 



Dry hillsides or hollows of the Coast Eanges, preferring slightly alkaline 

 localities: Knights Valley grade and Howell Mt. southward to New Almaden. 

 Aug.-Sept. Also on the north Atlantic Coast and in Europe. 



2. AMMANNIA L. 



Glabrous annuals with mostly 4-angled stems. Leaves opposite, sessile or 

 narrowed to a short-petioled base. Flowers purplish, 2 or more in each axil. 

 Calyx campanulate (in fruit globose or nearly so), the tube 8-ribbed, 4-toothed 

 and usually with small accessory teeth in the sinuses. Petals 4, purplish, small 

 and deciduous, or wanting. Stamens 4 to 8. Capsule globular. (Johann 

 Ammann, a German botanist of the 18th century.) 



Leaves sessile by a broad auricled base 1. A. coccinea. 



Leaves tapering at base, sometimes short-petioled 2. A. humilis. 



1. A. coccinea Kottb. Erect, simple or branching below, 4 to 14 in. high; 

 Leaves horizontally spreading, broadly linear or somewhat narrowed towards 

 the apex, 1 to 2 in. long, sessile by a broad auricled base; flowers in whorls of 

 2 to 5; calyx in flower narrowly campanulate, strongly 8-ribbed, in fruit dis- 

 tended and the ribs less obvious; capsule 2 lines long. — (A. latifolia L.) 



Low lands along interior rivers: Cache Creek; lower Sacramento Eiver 

 islands ; San Joaquin River. 



2. A. humilis Michx. Smaller; leaves linear-oblanceolate, tapering at base 

 (not auricled) and sometimes short-petioled; flowers 1 to 3 in each axil; 

 accessory teeth of the calyx sometimes as long as the proper teeth ; capsule 

 dehiscent septicidally. 



Stockton. 



ONAGRACEAE. Evening Primrose Family. 



Annual or perennial herbs with simple leaves sometimes lobed or divided. 

 Flowers complete, symmetrical, the parts in 4s (rarely in 5s or 2s), borne in 

 spikes or racemes, or solitary. Calyx-tube adnate to the ovary, the petals and 

 stamens inserted at its summit. Stamens twice as many as the petals or as 

 many. Pollen commonly cobwebby. Ovary wholly inferior, 4 (sometimes 5 

 or 2) -celled; style alwaj's single; stigma-lobes as many as the cells of the 

 ovary, or stigma capitate. Fruit a capsule or rarely indehiscent. Seeds mostly 

 small, naked or with a tuft of hairs at apex (coma); endosperm none. — An 

 order of showy plants with a large representation in western America. 



- of the flower in 4s or 5s; fruit a capsule (indehiscent in no. I). 

 Tube of the calyx not produced beyond the ovary, the limb divided down to the ovary 

 and persistent on it after flowering. 

 Petals 5, y 2 in. long or more; fruit at length reflexed 1. Jus- 

 Petals none or minute; fruit erect 2. Ludwigia. 



