102 FAM. 130. 



I. (L.) palustris. Smooth; petals reddish or wanting. Swampy places. 

 I. (L.) natans. Smooth; flowers with inconspicuous corolla. Marshes. 



4. Stems erect or ascending; leaves alternate; — herbs with axillary or 



terminal 4-parted flowers. Summer and Fall. - Ludwigia 



L. pilosa. Stem woody, much branched, pilose; leaves sessile, lanceolate or 

 oblong; flowers in terminal spikes; petals mostly wanting. Ponds near 

 the coast. 



L. lanceolata. Stem stout, at length branched, smooth; leaves sessile, lanceo- 

 late; flowers small in all the axils; petals wanting. Pine-barren ponds. 



L. microcarpa. Stem slender, 3-angled; leaves short-pet ioled, spatulate or orbi- 

 cular; flowers axillary, inconspicuous, petals wanting. Muddy places, 



L. a'.ata. Stem slender, narrowly winged; leaves linear, lanceolate; flowers in- 

 conspicuous, petals wanting. Marshes. 



L. linifolia. Stem low, glabrous, 4-angled, often purplish; leaves linear, sessile; 

 flowers sessile, inconspicuous; petals as long as the sepals. Swampy pine- 

 land. 



L. linearis. Stem branching, glabrous; leaves narrowly linear, sessile; flowers 

 sessile, petals slightly longer than the sepals, yellowish. Swamps. 



5. Leaves undulate or toothed; flowers in terminal spikes, sepals elon- 



gated; ovules in 2 or more rows, horizontal; capsule erect, taper- 

 ing, --------- Onagra (Oenothera) 



O. biennis. Stem stout, hirsute; leaves oblong to lanceolate; sepals slender, 

 corolla bright yellow. Dry soil. Summer and Fall. 

 5. Leaves sinuate or pinnatifid; flowers mostly axillary; sepals decidu- 

 ous; ovules in 2 rows, ascending; capsule narrowly-cylindric; 

 seeds terete, crowned with a tubercle, - Oenothera, Evening Primrose 



O. laciniata (sinuata). Stem ascending or diffuse, smooth or downy; leaves 

 oval, oblanceolate to spatulate, sinuate-dentate or pinnatifid; seeds strongly 

 pitted. Dry sandy soil. Spring and Summer. 



O. humifusa. Stem with spreading branches near the base; basal leaves oblong- 

 spatulate, pinnatifid; cauline ones lanceolate, undulate, toothed; seeds 

 striate. Sand along the coast. Spring and Summer. 

 5. Leaves ovate, dentate; flowers drooping, axillary; calyx tubular- 

 funnel form, colored, limb 4-lobed; petals 4; stamens 8, exserted, 

 style long-exserted. Cultivated. - Fuchsia 



F. coccinca. With scarlet sepals and violet-purple petals; — F. fulgens with bright 

 red flowers; — and other varieties. 



130. Gunneraceae (Halorrhagaceae), Water-Milfoil Family. 



Aquatic herbs with alternate or whorled leaves, the 

 submerged finely divided, the emersed entire or toothed; 

 flowers perfect or monoecious, axillary or terminal. 



1. Stems creeping, leaves toothed or the lower dissected; flowers perfect, 

 minute, greenish, axillary; calyx 3-4 angled and lobed; petals 

 none; stamens 3-4, included; ovary 3-4 celled, inferior; stigmas 

 3-4; fruit nut-like. In wet sdil or in pools. Spring to Fall. Proserpinaca 

 P. pectinata. All leaves nearly alike; sepals ovate, erect. 

 P. palustris. Leaves of two kinds; sepals triangular, ascending. 

 1. Stems commonly floating, leaves of two kinds; flowers monoecious, 

 minute, axillary or in terminal spikes with the upper ones sterile, 



