ONAGEACEiE. (etening-pkimeose familt.) 129 



1. N. verticillata, H. B. K. Smooth or downy; stems recurved (2°- 

 8° long), 4-6-sided ; leaves lanceolate, nefSly sessile, opposite or whorled, the 

 upper with clustered flowers in their axils on short pedicels ; petals 5, wedge- 

 lanceolate, rose-purple (J' long) ; stamens 10, half of them shorter. (D6codon 

 verticillatum, Gmdin.) — Swampy grounds, common. July -Sept. 



4. Cl^PHEA, Jacq. Chphea. 



Calyx tabular, 12-ribbed, somewhat inflated below, gibbous or spurred at tlie 

 base on the upper side, 6-toothed at the apex, and usually with as many little 

 processes in the sinuses. Petals 6, very unequal. Stamens mostly 12, approxi- 

 mate in 2 sets, included, unequal. Ovary with a curved gland at the base next 

 the spur of the calyx, 1 - 2-eeUed : style slender : stigma 2-lobed. Pod oblong, 

 few-seeded, early mptured through one side. — Flowers solitary, stalked. (Name 

 from Kvtjios, gibbous, from the shape of the calyx, &c.) 



1. C. viscosissima, Jacq. (Clammy Cuphea.) Annual, very vis- 

 cid-hairy, branching ; leaves ovate-lanceolate ; petals ovate, short-clawed, purple. 

 — Diy fields. New York to Penn., Kentucky, and southward. Aug. — Seeds 

 flat, borne on one side of the placenta, which is early forced out the pod. 



Oedee 43. ONAGRACE.iE. (Evening-Peimeose Family.) 



Herbs, with i-merous (sometimes 2 - Z-merous) flowers ; the tube of the 

 calyx cohering with the 2 - i-cetted ovany, its lobes valvule in the bud, or obso- 

 lete, the petals convolute in the bud, and the stamens as many or tvnce as 

 many as the petals or calyx-lobes. — There are two suborders, viz. : — 



Suborder I. ONAGRACEJE proper. 

 Calyx-tube often prolonged beyond the ovary ; the petals (rarely want- 

 ing) and stamens inserted on its summit. Pollen-grains connected by cob- 

 webby threads. Style single, slender: stigma 2- 4-lobed or capitate. Pod 

 loculieidally 4-ceIled and 4-valved, or indehiseent : placentas in the axis. 

 Seeds anatropous, no albumen. 



1. BPILOBIUM. Stamens 8. Petals 4. Seeds Tvith a largo downy tuft at the apex. 



2. (ENOTHBRA Stamens 8. Petals 4. Calyx-tube prolonged. Seeds naked, numerous. 



8. GAURA Stamens 8. Petals 4 Calyx-tube prolonged. Pod 1 - 4-seeded, indehiseent. 

 4. JU^SLffiA. Stamens 8 - 12. Petals 4-6. Calyx-tube not prolonged. Pod many-seeded. 



5 LUDWIGIA. Stamens 4.' Petals 4, or none. Calyx and pod as in No 4. 



6 CIRCJBA. Stamens 2. Petals 2. Calyx slightly prolonged. Pod 1 - 2-oelled, 1 - 2-seeded 



Suborder II. HALORAGB.a;. 

 Calyx-tube not at all prolonged beyond the ovary, the lobes obsolete. 

 Petals often none. Stamens 1-8. Fruit indehiseent, 1 - 4-celled, with a 

 solitary suspended seed in each cell. Albumen thin. — Aquatic plants, 

 with very small axillary, sessile flowers, often monoecious or dioecious. 

 7. PROSERPINACA Stamens 3. Fruit 3-sided, 3-celled. Flowers perfect. 

 8 MYRIOPHYLIiUM. Stamens 4 - 8. Fruit 4-angled, 4-celled. Flowers monoecioas. 



9. HIPPURIS. Stamen 1. Fnnt 1-celled. Style slender. Flowers perfect. 



