ONAGRACEiE. (EVENING-PRIMROSE FAMILY.) 101 



# Capsule loculicidal, inaiiy-seeded (the cells rarely only several-heeded). I'arta of the 



flower iji fours, 

 t- Seeds comose at the apex : lower leaves often ojjposite : stan)ens 8. 

 ]. Zauschneria. Calyx-tube continued much beyond the ov;iry, funnel-form. 

 •2 Epilobiuin. Calyx 4-parted nearly down to the ovary, or with a short and campanu- 

 late tube lieyond it. 



*• -t- Seeds not comose : leaves all alternate. 

 ++ Anthers attached near the middle and versatile : petals generally yellow or white or some- 

 times changing to rose-color. 



3. Gayophytum. Calyx-tube not produced beyond the ovary ; tiiis and the membranous 



capsule only 2-celled. The stamens opposite the i)etals usually sterile. 



4. OBnothera. Calyx-tube produced beyond the ovary into a linear or obconical tube. 



Anthers all uniform. Petals without claws. 

 ++ -H- Anthers attached at or near the base, remaining erect ; those opposite the petals much 

 shorter, or sterile, or rarely wanting : petals never yellow. 



5. Clarkia. Calyx-tube above the ovary obconical ; its lobes reflexcd. Petals with claws, 



either lobed or entire. Capsule coriaceous. 



* * Fruit dry and indehiscent, 1 to 4-seeded. Parts of the flower in fours, or rarely threes. 



In ours the stamens are 8, and the anthers are attached by the middle. 



6. Stenosiplion. Alternate stamens a little shorter. Ovary 1-celled. Leaves scattered. 



7. Gaura. Stamens nearly equal : filaments with a scale-like appendage on the inside nej" 



the base. Ovary 4-celled. Leaves alternate. 

 * * * Fruit indehiscent, bur-like, 1 to 2-seeded. Parts of the flower in twos throughout 

 S. Circsea. Leaves opposite. 



1. ZAUSCHNERIA, Presl. 



Calyx-tube deeply colored above the ovary, with a small globose base and 

 4-lobed limb, appendaged with 8 small scales, 4 erect and 4 deflexed. Petals 

 obcordate or 2-cleft, scarlet. Stamens exserted. Style long and e.xserted. 

 Capsule linear, obtusely 4-angled. — Low decumbent perennial, somewhat 

 woody at base : leaves sessile : the large scarlet Fuchsia-like flowers in a 

 loose spike 



L Z. Calif ornica, Presl. More or less villous and often tomentose: 

 leaves narrowly lanceolate to ovate, entire or denticulate : capsule attenuate 

 to the slender base, sometimes shortly pedicellate. — From New Mexico to 

 the Wasatch and N. W. Wyoming, and thence to California. 



2. EPILOBIUM, L. Willow-IIkkb. 



The alternate stamens shorter: anthers fixed near the middle. Capsnlo 

 linear, 4-sided. — Perennial or aimual : leaves alternate or ojiposito, nearly 

 sessile, denticulate or entire, often fascicled : flowers rose-color, j)ur])lo, or 

 white, very rarely yellow. 



* Flowers larrje : stamens and stj/Ie declined : stir/tna-lobes spread infj : leaves 



scattered. 



I. E. SpicatUin, Lam. Stem erect, simple, often 4 to 1 feet high: leaves 

 lanceolate, sessile, nearly entire, the veins anastomosed near the edge: fowers in 

 a long spicate raceme, bracteate, purplish-lilac : st//le hain/ at the base, at first 

 deflexed. — E. angustifolium, L. Common across the continent. 



