Flora of the Palouse Region 1 2 1 



Family 54. ONAGRACEAE. 



Herbs or sometimes shrubby: leaves simple, alternate or op- 

 posite; stipules none: flowers perfect, symmetrical, the parts mostly 

 in fours: calyx-tube adherent to the ovary: petals on the throat of 

 the calyx or wanting: stamens as many or twice as many as the 

 petals or calyx-lobes, on the calyx-tube: style single, slender; 

 stigma-lobes as many as the cells of the ovary: fruit a capsule or 

 small nut; endosperm none. 



Fruit indehiscent, nut-like. 204. GAURA. 



Fruit a many-seeded capsule. 



Seeds with a tuft of silky hairs: lower leaves opposite. 



197. EPILOBIUM. 

 Seeds naked: all leaves alternate. 



Capsule 2-celled: calyx-tube not produced beyond the ovary. 



198. GAYOPHYTIM. 

 Capsule 4-celled: calyx-tube produced beyond the ovary. 



Anthers attached at or near the base, erect. 



Petals with claws. 199. clarkia. 



Petals without claws. 200. boisdiyalia. 



Anthers attached near the middle, versatile. 



Stamens unequal, the alternate longer. 



201. pachylophts. 

 Stamens equal in length. 



Stigma deeply 4-cleft, its segments linear. 



202. ox AGRA. 

 Stigma entire. 203. sphaerostigma. 



197. EPILOBIUM. 



Mostly perennial herbs: leaves nearly sessile, denticulate or en- 

 tire, alternate or opposite: flowers axillary or terminal, solitary or 

 clustered: calyx-tube scarcely prolonged beyond the ovary, 4-cleft: 

 petals 4, spreading or somewhat erect: stamens S, the 4 alternate 

 ones shorter: fruit a dehiscent capsule: seeds numerous, with a 

 tuft of silk\ r hairs at the end. 



Calyx-tube not extending beyond the ovary: flowers large, 2-3 cm. broad: 



leaves alternate. K- SPICATUM. 



Calyx-tube extending beyond the ovary: leaves opposite. 



Much branched: stigma 4-lobed. K. paxicilatim. 



Usually simple: stigma entire. K. ADENOCAULON. 



E. spicatum Lam. Perennial, erect, about 1 m. high, glabrous or puber- 

 ulent: leaves numerous, lanceolate, acute, entire or denticulate, nearly 

 sessile, 8-16 cm. long; lateral veins confluent at the margin: raceme erect, 

 many-flowered, 20-40 cm. long: flowers rose-colored. 2-3 cm. broad; pedicels 

 slender, exceeding the narrow bracts: petals obovate, entire, clawed: stigma 

 4-lobed: capsules spreading, linear, canescent, 5-10 cm. long. Not uncom- 

 mon, sometimes a troublesome weed. 



E- paniculatum Nutt. Annual, glabrous or minutely pubescent, much- 

 branched above, 30-60 cm- high: bark becoming loose and papery at base: 



