Zauschneria. ONAGRACE.E. 217 



Tkibe III. GAUIilXE.E. Limb or produced tube of the calyx deciduous from the dry and 

 indehiscent 1 - 4-sc-eded fruit. Parts of the flower in fours or rarely threes. Leaves alternate. 



12. Gaura. Stamens S, all perfect : anthers attached by the middle, versatile. 



13. Heterogaura. Fertile stamens 4, with anthers attached at the base : sterile stamens before 



the petals 4. 



Tribe IV. C'IRCJSE/E. Limb of the calyx deciduous from the indehiscent bur-like 1-2- 

 secded fruit. Parts of the flowers in twos throughout. Leaves opposite. 



14. Circs; a. The only genus. 



1. JUSSI.EA, Linn. 

 Calyx-tube not prolonged above the elongated ovary, the 4 to G herbaceous lobes 

 persistent. Petals as many, obovate, spreading, yellow. Stamens 8 to 12. Ovary 

 4-G-celled: style simple: stigma capitate, 4 - 6-grooved. Capsule elavate, 4 — 6- 

 valved, dehiscing septicidally, or somewhat irregularly between the ribs, many- 

 seeded. Seeds Ln several rows in each cell (or iu one row in the following species, 

 and surrounded by a thick epicarp), naked. — Aquatic or marsh herbs; leaves entire, 

 alternate, with very small stipules; llowers solitary, axillary, usually on 2-bractec- 

 late pedicels. 

 Species about 40, belonging mostly to Tropical America. 



1. J. repens, Linn. Perennial, glabrous or puberulent : stems creeping and 

 rooting at base, 1 or 2 feet long, the branches ascending: leaves oblanceolate or 

 elliptical, 1 to 3 inches long, rather obtuse, tapering below into a long slender peti- 

 ole : flowers nearly an inch broad : style stout, hairy : capsule 1 to \\ inches long, 

 nearly terete, \\ lines broad : pedicels 1 to 2 inches long, In-acted: seeds in one 

 row, covered by a thick white spongy adherent epicarp. 



Var. Californica, Watson. Plowers smaller, (i to S lines broad : style slender, 

 glabrous: capsule smaller, 8 to 10 bines long, 2 lines broad: pedicels shorter, 1 

 to ii lines long: seeds slightly larger. 



Cedar Lake, Cache Creek (Bolander) ; Northern Sonora (Con Her, Thurher); the variety only. 

 which is probably to be regarded as a distinct species. Forms of the Linnean species are of wide 

 range uu the eastern side of the continent and also occur in the East Indies. 



2. LTJDWIGIA, Linn. 



Calyx-tube not produced beyond the short ovary, the 1 lobes usually persistent. 

 Petals 4, often small or wanting. Stamens 4; filaments short. Capsule- short or 

 cylindrical, many seeded, 1-valved, dehiscent septicidally or by openings at the sum- 

 nut. Seeds minute. — Aquatic or marsh perennials ; leaves entire (opposite in our 

 species) ; flowers axillary, mostly solitary and sessile. 



Almut 20 species, mostly North American, a few belonging to the Old World. A single sp i ies 

 is native to the Wi tern I oast, of rare occurrence. 



1. L. palustris, I'.ll. Smooth, creeping or floating: leaves all opposite, ovate 

 01 oval, \ to 1 inch long, tapering to a short petiole, acute : flowers solitary, sessile: 

 petals none or short and reddish: capsule short-oblong, 2 lines [on 

 what t-angled. 



Siern . Oregon (Douglas, ffall); and on the Atlantic sido from the Saskatcha- 



wan and Canada to the Gulf of Mexico: also in Europe. 



3. ZAUSCHNERIA, PresL 



Tube of tbo calyx funnelform and deeply col, .red above the ovary, with a small 

 globose base and a I lobed limb, deciduous, appendaged within with 8 small scales, 



