124 ORDER 54. ONA_GRACE,. 



4 L.. Saliciiria L. More or less pubescent; Ivs. lanceolate, cordate at base ; fls 



nearly sessile, in a long, somewhat verticillate, interrupted spike ; pet. (i or 7; stam. 



twice as many. Wet meadows, N. Eng., N. Y. Rare. 2 5f. Fls. showy, purple. 1 



/3. ROSEUM. Flowers rose-red, in many spikes, all summer. A fine garden variety. 



5. NES2EA, Juss. Calyx short, broadly campanulate, with 5 erect 

 teeth, and 5 elongated, spreading, hornlike processes. Sta. 10, alternate 

 ones veiy long. Sty. filiform. Caps, globous, included, oo-seeded. is. Lvs. 

 opposite or verticillate. Flowers axillary, purple. 



ti, verticilla.ta Kunth. Swamps, common. Stems woody at base, stoloniferous, 

 2 4f, angular ; Ivs. lanceolate, acuminate, opposite or in whorls of 3's ; fls. in a long, 

 leafy, showy, slender panicle of umbels. (Decodon verticillatum Ell.) 



6. AMMANNIA, L. Calyx campanulate, 4-5-toothed or lobed, gen- 

 erally with as many hornlike processes, alternating with the lobes. Pet 

 4 or 5. Sta. as many, rarely twice as many as the calyx lobes. Capsule 

 globujar, 2-4-celled, oo-seeded. Stems square and leaves opposite, 

 entire. Flowers axillary. 



A. liiimilis MX. St. branched from the base, ascending ; Ivs. lanceolate, obtuse, 



tapering at base into a short petiole : fls. solitary, closely sessile, all the parts in 4's ; 



sty. very short. Ditches. A low herb, with inconspicuous flowers. Aug., Sept. 



2 A. latifolia L. St. erect, branching ; Ivs. linear-lanceolate, acute, dilated and au- 



ricled at the sessile base ; cal. 4-angled, 4-horaed ; fls. crowded. Wet, W. 1 2f. Ptirp. 



7. DIDIPLIS, Raf. Calyx 4-lobed, without accessory teeth. Pet. 0. 

 Sta. 24. Ov. 2-celled. Stig. 2-lobed, subsessile. Caps, globous, burst- 

 ing irregularly, co-seeded. ? Leaves opposite, crowded, linear. Flowers 

 axillary, sessile, minute. (Hypobrichia, Curt) 



1>. diandra. Ponds and sluggish streams, 111. and S. 10 20' long. Jn.-Aug. 



ORDER LIV. ONAGRACEJ3. ONAGRADS. 



Herbs, rarely shrubs, with the flowers 4-(sometimes 2 or 3)-parted, with 

 the calyx tube adhering to the 2-4-celled ovary, and teeth valvate in the 

 bud ; the petals convolute in the bud, sometimes obsolete as well as the 

 calyx teeth. Stamens as many or twice as many as the petals or calyx 

 teeth. Ovary 2-4-celled, styles united, and stigmas capitate or 4-lobed 

 Fruit capsular or baccate, 2-4-celled. Seeds with little or no albumen 

 Figs. 13, 54, 138, 317, 385. 



Stamens 8, or twice as many as the petals or sepals. ..(a) . 



a Calyx tube not prolonged above the ovary.?; Seeds comons EPILOBIUM. 1 



b Seeds glabrous JUSSI^A. 2 



a Calyx tube prolonged, c the free summit slender. d Seeds comous, OC ZAUSCHNERIA. 3 



d Seeds glabrous, 00 (ESOTHERA. 4 



d Seeds glabrous, 1-4 GADRA. 5 



c the free summit enlarged,* short. Pet. clawed CLARKIA. 6 



e long. Pet. sessile FUCHSIA. 7 



Stamens* or 2, as many as the sepals. d Flowers 4-parted LUDWIGIA. 9 



d Flowers 2-parted CIRC.BA. 9 



1. EPILOBIUM, L. WILLOW-HERB. ROSE BAY. Cal. tube not pro- 

 longed boyond the ovary, limb deeply 4-cleft, deciduous. Sta. 8. Stig 



