L YTHRACE&.ONAGRACE&. 



22 9 



urceolate tube, which coheres only with the angles of the ovary. 

 Petals as many as the calyx-segments, twisted in prefloratton, 

 Stamens twice as many as the petals. Anthers I -celled, before 

 flowering contained in the cavities between the calyx and ovary. 

 Fruit a capsule. 



Rhexia. Calyx-tube with a 4-cleft, persistent limb. Petals 4. 

 Stamens 8. Style declined. Capsule 4-celled, with prominent pla- 

 centoe. if. 



R. VIRGINICA (Meadow Beauty). Stem somewhat hispid, with 4 slightly 

 winged angles ; leaves sessile, oval- lanceolate, strongly 3-nerved ; flowers 

 large, bright purple, showy and numerous, in corymbose cymes ; petals obo- 

 vate ; anthers long, yellow, crooked. A very showy plant, 6'-i2' high, in 

 wet ground. July- August. 



Order XXXV. LYTHRACE^E (Loosestrife Family]. 



Herbs with 4-sided branches and exstipulate, entire leaves. 

 Calyx inclosing the many-seeded pod, and bearing petals and 

 stamens on its throat. Style I ; stigma capitate. The flowers 

 axillary or \vhorled. Seeds exalbuminous. 



Nesaea. Calyx broadly campanulate, 5 erect teeth and 5 elon- 

 gated horns. Stamens 10, those opposite calyx-teeth very long. Style 

 filiform. Stigma small. Capsule globose within calyx ; many-seeded. 



N. VERTICILLATA (Swamp Loosestrife}. Stem simple, woody, with 

 recurved branches rooting at the summit ; 4-6-angled ; leaves opposite or 

 whorled, entire, on short petioles ; flowers purple, axillary, nearly sessile. 

 Common in swamps. August-September. 



Order XXXVI. ONAGRACE^E (Evening Primrose Family]. 



Herbs or shrubs. Flowers axillary, in spikes or racemes. 

 Sepals united in a tubular 2-6-lobed calyx. Petals usually as 

 many as the calyx-lobes, and alternate with them, sometimes 

 none. Stamens as many or twice as many, inserted in the calyx - 

 throat ; filaments distinct. Ovary coherent with the calyx-tube, 

 2-4, or by abortion i-2-celled. Style prolonged. Fruit baccate, 

 or capsular. 



C Calyx-tube not above ovary Epilobium, 

 'Stamens 8 \ 



above ovary- 

 DNAGRACE^E.^ [Capsule berry-like-/^a. 



[Petals 4 or nonzLudwigza, 

 [Stamens 2-4 ? 



I Petals 2 Circata. 



