riiIMl*LACE.K. (PRIMROSE FAMILY.) 270 



spreading spikes ; calyx funnel-shaped, smooth, the lohes of tlic scarious limb 

 alternating with 5 smaller ones. — Salt marshes, Florida, and northward. Aug. 

 and Sept — Scape J ,°- 2° high. Leaves 3'- 6' long. Flowers blue. 



2. PLUMBAGO, Tourn. Lbadwort. 



Calyx tubular, 5-rihhcd, 5-toothed. Corolla salver-shaped, 5-lobed. Stamens 

 5, inserted on the receptacle. Styles united. Stigmas linear. • Utricle splitting 

 into valves from the base upward. — Herbs or shrubs, with alternate entire 

 mostly clasping leaves, and blua or white flowers in terminal spikes. 



1. P. SCandens, L. Shrubby; leaves ovate-lanceolate, acute, narrowed 

 into a clasping petiole; calyx glandular-viscid, half as long as the tube of the 

 corolla; lobes of the corolla ovate, white; style smooth. — Soutli Florida. — 

 Leaves 2' - 3' long. Spike elongated. 



Order 87. PRIMUXACEiE. (Primrose Family.) 



Herbs, Avith simple alternate or opposite leaves, and regular flowers. — ■ 

 Calyx 4 - 5-lobed, persistent. Corolla 4 -.5-lobed. Stamens 4-5, oppo- 

 site the lobes of the corolla, and inserted on its tube. Ovary free, or 

 partly adherent to the calyx, 1-celled, many-oyuled. Placenta central, 

 globose. Style single. Capsule 1-celled, many-seeded, valvate or circum- 

 Bcissfle. Seeds anatropous or amphitropous. Embryo straight in fleshy 

 albumen. 



Synopsis. 



* Ovary free from the caly x. 

 •*- Capsule opening by valves or teeth. 



1. IIOTTONIA. Corolla salver-shaped. Leaves pectinately disseeted. 



2. LYSI.MACIirA. Corolla wheel-shaped. Stems leafy. Leaves opposite, entire. 



3. DODECATIIEOX. Corolla wheel-shaped. Stemless. Leaves radical. 



-»- -— Capsule opening transversely. 



4. AXAGALLIS. Parts of the flower 5. Leaves opposite. Stamens bearded. 



5. CEXTUXCULUS. Parts of the flower 4. Leaves alternate. Stamens beardless. 



* * Ovary partly adherent to the calyx. 

 G. SAMOLUS. Stamens 5, with sterile filaments interposed. Capsule valvate. 



1. HOTTONIA, L. 



Calyx 5-partcd. Corolla salver-shaped, 5-lobcd. Stamens 5. Style slender. 

 Capsule globose, at length splitting into 5 valves, which cohere at the base and 

 apex. Seeds fixed by the base, anatropous. — Aquatic perennial herb-;, with 

 pectinately dissected leaves. Flowering stems mostly clustered, nearly leafless, 

 inflated, bearing at the joints whorls of small white flow 



1- H. inflata, Ell. Flowering stems 3 -several in a terminal cluster, much 

 inflated: upper stem-leaves crowded, with filiform divisions; bracts entire.— 

 Ponds and ditches in the upper districts, Mississippi, and northward. June. 



