522 ONAGRACE^. Ludwigia. 



In swamps, 6cc. Virginia! and N. Carolina! to Florida! Louisiana! 

 and Arkansas ! July-Sept. — Stem about 2 feet high. Leaves mostly biglan- 

 dular at the base. Pedicels with 2 cordate glands near the middle. — The 

 depauperate variety was collected near Fayetteville, N. Carolina, by Dr. 

 McRea. 



Jussiaa subacaulis of Pursh is QCnothera hoterantha, Nutt. 



11. LUDWIGIA. Linn. gen. jJ- 60 ; Lam. ill. t. 77 ; Ell. sic. 1. p. 214. 



Ludwigia & Isnardia, Linn. <^c. (also Ludwigia, DC.) 



Calyx-tube prismatic or cylindrical, or somewhat turbinate, mostly short, 

 not prolonged beyond the ovary ; the lobes 4, mostly persistent. Petals 4, 

 often minute or wanting. Stamens 4, opposite the lobes of the calyx. 

 Apex of the ovary either truncate or flattish, or crowned with the pyramidal 

 or often depressed persistent 4-lobed base of the style (stylopodium) : style 

 short: stigma capitate, often 4-furrowed or lobed. Capsule short, or rarely 

 elongated, 4-celled, often opening by the separation or perforation of tlie 

 stylopodium, at length 4-valved. Seeds very numerous. — Perennial or 

 rarely annual herbs, growing in wet places. Leaves alternate or opposite, 

 entire ; the veinlets often confluent along the margins, so as to formi an 

 intramarginal vein. Flowers axillary, or sometimes spicate or capitate at 

 the extremity of the stem or branches. 



§ 1. Leaves alternate, sessile : capsules short, truncate at the apex, or crowned 

 with a depressed stylopodium. — Euludvdgia. (Isnardia, DC. partly). 



* Flowers large, pedicellate : petals conspicuous : stylopodium large, depressed. 



1. L. alternifolia (Linn.): minutely puberulent or almost glabrous; 

 stem erect, slightly angled, branching ; leaves lanceolate or oblong-lanceolate, 

 rather acute, attenuate at the base and almost petioled ; flowers axillary, 

 solitary, pedicelled ; pedicels bibracteolate above the middle ; petals scarcely 

 the length of the large ovate acuminate spreading lobes of the calyx ; cap- 

 sules shorter than the calj^x, subglobose-cubical, with winged angles. — 

 Linn. spec. 1. p. 118 ; Lam. ill. t. 77 ; Ell. sk. 1. p. 217 ; Bigel. ! fi. Bost. 

 ed. 2. p. 60. L. ramosissima, Walt. Car. p. 89. L. macrocarpa, Michx. ! fl. 

 1. p. 89 ,• Torr. ! fl. 1. p. 180 ; Bart.fl. N. Amer. 1. 14. L. salicifolia, Pair. ? 

 L. aurantiaca, Raf. in med. rep. 11. pi. 358. L. uniflora, Raf. I. c. ? Isnardia 

 alternifolia, DC! prodr. "i. p. 122. Rhexia linearifolia, Poir. fide DC. 



In swamps, Canada ! to Florida ! and Arkansas ! July-Sept. — Stem 

 2-3 feet high. Leaves 1-3 inches long, with distinct intramarginal veins. 

 Pedicels 3-4 lines long. Flowers large, yellow. Calyx-lobes very large 

 and broad, often purple or reddish within. Anthers very short. Stigma 

 large. Capsule (as also in L. liirtella and virgata) opening first by a hole 

 left by the falling away of the style, afterwards by the separation of the 

 stylopodium or summit of the capsule, which at length often falls in pieces 

 by loculicidal dehiscence. — Bastard Loosestrife. 



-r^~2. L. hirtella (Raf.) : hirsute ; stem erect, scarcely angled ; leaves 



' (mostly short) ovate-oblong, the upper ones lanceolate or oblong-linear, 



closely sessile, obttise ; flowers (large) axillary, solitarj^ on distinct pedicels, 



