ONAGRACEH. (EVENING PRIMROSE FAMILY.) 59 
2. ©. czespitosa, Hawworth. Similar to the last; smooth glaucous-green; flowering 
branches 6 to 12 inches high, with broadly triangular-ovate clasping leaves. The most 
common species. 
TILLAA MINIMA, Wiers., asmall herb 1 to 3 inches high with clusters of minute white flow- 
ers in the axils of the opposite leaves isa common under-herb in moist places; asis also 7. angusti- 
folia, Nutt., only an inch high with solitary flowers. 
Orpir LYTHRACHEZ is represented by Lythrum alatum, Pursh., var. linearifolium, 
Gr. An herb a foot or two high with angled stemes and small deep purple 6-petaled 
flowers solitary in the axils of the entire sessile leaves. 
Orper 24. ONAGRACEAL. 
Herbs (snrubby exotics), with the parts of the flowers in fours, the calyx tube adnate 
to the ovary, the petals borne on its throat, and the stamens as many or twice as many. 
Style always single. 
Aquatic stems creeping......... Med Bae eee ass Siisawie sasGiee SEG NES EGET ose Jussiza. 1 
Flowers scarlet, fuchsia-like...........0ecnceeeees o sew stores etd .....,Zauschneria, 2 
Flowers small, purplish, leaves mostly appoitte tsielsies wae Sess seeeeee ee bspilobium. 3 
Anthers attached near the center.......... sedveuiets sisasareehe a eiibtats ,--Ginothera. 4 
Flowers purple, calyx lobes reflexed...........0.0eeesesceceeeeceeecees .Godetia, 5 
Petals clawed, calyx-tube short........... hee aidcateis SisiecRagueseioie a brovachsarbuer® ...Clarkia. 6 
Petals clawed, calyx-tube filiform...... sors Dede cudieie seedese DacCManadium, <7 
Flowers purple in leafy spikes.......... odie deseiGeavenand os eeeececoesess DOisduvalia. 8 
Flowers minute, white, parts in twos............eeeeee0 suiraea Cuore eiare:e eae tei Circea, 9 
1. JUSSIZA, L. 
The 4 to 6 herbaceous lobes of the calyx persistent. Petals as many, obovate, spread- 
ing, yellow. Stamens twiceas many. Capsule clavate. 
1. J. repens, L., Var. Californica, Wat. Characterized sufficiently by its 
creeping stems and its solitary axillary flowers nearly an inch in diameter. 
2, ZAUSCHNERIA, Presl. 
Tube of the calyx much prolonged beyond the linear ovary, colored, the 4-lobed 
limb with 8 small deciduous scales, 4 erect and 4 deflexed. Stamens 8, exserted. 
1. Z. Californica, Presl. The scarlet fuchsia-like flowers over an inch long cannot 
be mistaken. 
3. HPILOBIUM, L. WILLow-aERB. 
The seeds tufted with silky hairs in linear 4-sided, 4-valved capsules best mark this 
difficult genus. 
