ICO (i.\A<;i!Af'E.T-:. (i:vKNiN<;-riM."\n:()SK kamilv.) 



ri;tiir\i'(l. l-'riiii l»pii_v, 4-<-cllt.Ml, 4-1')1»l'(1, indcliiscciit. — Acjiuitic jaTcniiial 

 lierlis, willi tlii^ siilniifrycMl li-iives iiiiiiiiitely iliviilcil into (iliforin <ir caiiillary 

 Rognu'iits, .-vikI cDiiiiiHtiily wlioiled. Fluwcrs miiiuto in llie uxils of the upper 

 leaves; tlic n])j)i'riii()>t sici-ilc. 



# Sidmciis 8 : _//'«/< t'cen or irartj/. 



1. M. laxum, Slmltlw. Stem long, slender; leaves 4 in awlmrl; tlie 

 floral lines nMliucd to minute nearly entire spatulate bracts, shorter tiiaii the 

 flowers, wliirh thus form an intermitted almost naked s]iiive; fruit roughened 

 witli mintite warts, with the lolies ol)tnse. — I'onds and lakes. Middle and 

 West I-"lorida. tluly. 



2. M. verticillatum, L. Leaves ill whorls of 3-4, the floral ones lin- 

 ear, i)i(tin;vtely toothed, mueh longer than tlie flowers; fruit smootli. — Still 

 water in the lower districts. July. — Stem 2^-4° long, stouter than the last. 



* * S/iimf'ii.s 4 : fruit ridged and roughened. 



3. M. heterophyllum, Michx. Stem thick; leaves 4 -fj in a wliorl, 

 the floral ones crowded, ovate or lanceolate, finely and sharply serrate ; the 

 lower ones jjinnatifid ; frnit .sliglitly rougliened. — Ponds and ditches. July. 



4. M. scabratum, Michx. Stem short (6'- 12'); leaves 4-5 in a 

 whorl, the divisions few and capillary, the floral ones linear, pectinately 

 tootlicd ; fruit strongly ridged and roughened. — Siiallow ponds, Soutli Caro- 

 lina. June -July. 



OuDKu GO. OXAGRACE^aE. (Evening-Primrose Family.) 



Calyx adherent to the ovary, and often produced into a tube beyond 

 it, 2-(i-lobed, valvate in the bud. Petals as many as the lobes of the 

 calyx, inserted on its throat, convolute in the bud, sometimes wanting. 

 Stamens as many or twice as many, inserted with the petals. Ovaiy 

 2-4-celled. Placenta central. Style solitary : stigma capitate or 2- 

 4-lobe(l. Capsule loculicidally dehiscent or indehiscent. Seeds anat- 

 ropous, with little or no albumen. — Chiefly herbs. 



Synopsis. 



* Calyx tube produced beyond the ovary. 



1. 6AURA. Capsule nut-like, indehiscent, 1 - 4-seeded. 



2. OENOTHERA. Capsule 4-valved, many-seeded. 



* * Calyx tube not produced beyond the ovary. 



3. EPILOBIUM. Stamens 8. Petals 4. Seeds comose. 



4. JUSSI.EA. Stamens 8-12. Petals 4-C. Capsule long. Seeds naked. 



5. LUDWIGIA. Stamens 4. Petals 4, or none. Capsule short, many-seeded. 

 C. CIRC^A. Stamens 2. Capsule obovate, 1 - 2-seeded. 



1. GAURA, L, 



Calyx tube much produced beyond the ovary, the limb 3-4-lobed, reflexed, 

 deciduous. Petals 3-4, clawed, unequal or turned to the upper side. Sta- 

 mens 6-8. Style declined : stigma 4-lobed. Ovary 3 -4-celled. Fruit 3-4- 



