306 VERBENACE^. (VERVAIN FAMILY.) 



Synopsis. 



Tkibb I. VERBENE JE. — Ovule solitary, erect from the base of the cell, anatropous. 

 lladiclc pointing downward. Flowers in spikes or beads. 

 • Herbs. Fruit dry. 



1. [MUVA. Stamens 4. Fruit of 2 two-celled nutlets, enclosed in the inflated calyx. 



2. VEKBEX.A. Stamens 4. Fruit of 4 one-celled nutlets. Fruitinj; calyx not inflated. 



3. STACIIYTAKPII.\. Stamens 2. Fruit of 2 one-celled nutlets, imbcdd'd iu excavations of 



the thickened rachis. 



4. Lirri.\. Stamens 4. Fruit of 2 one-celled nutlets. Flowers capitate. 



# * Shrubs. Fruit fleshy or pulpy. 

 6. I..VXT.\X.\. Fruit of 2 one-celled nutlets. Flowers capitate. 

 6. 1'1TU.\UEXYLUM. Fruit of 2 two-celled nutlets surrounded by the cup-shaped calys. 



Flowers spiked. 

 7 DUU.4.NTA. Fruit of 4 two-celled nutlets enclosed in the beaked calyx. 



Tribe II. "VITE.3E. — Ovule solitary, suspended from the inner angle of the cell, am- 

 phitropous. Radicle pointing downward. Flowers in cymes. Fruit baccate. 



8. CALLICARPA. Fruit of 4 separate 1-celled nutlets. Shrubs. 



Tribe III. AVICEKNIjE. — Ovules by pairs, suspended from the apex of the c«ll, 

 amphitropous. Radicle pointing downward. Flowers iu imbricated spikes or heads. 

 Fruit capsular. 



9. AVICENNIA. Embryo large, germinating within the capsule. Trees. 



Tribe IV. PHRYME.^. — Ovule solitary, erect from the base of the 1-celled ovary, 

 orthotropous. Radicle pointing upward. Cotyledons convolute around their axis. 

 Flowers in elongated slender spikes. Fruit a caryopsis. 

 10. PIIRYMA. Corolla bilabiate. Stamens 4, didynamous. Fruit rcflexed. 



1. PRIVA, Adans. 



Calyx tubular, 5-toothcd. Corolla salvcr-shapcd, 5-clcft. Stamens 4, didy- 

 namous, included. Ovary 4-ccllcd. Style persistent. Fruit dry, separating 

 into two 2-celled spiny-angled nutlets, and included in the inflated membrana- 

 ceous calyx. — Perennial herbs, with senate petioled undivided leaves, and mi- 

 nute flosvers in a loose slender spike. 



1. P. echinata, Juss. Smooth or hispid ; stem branching ; leaves cordate- 

 ovate, acute, coarsely serrate; flowers alternate; fruiting calyx bristly with 

 hooked hairs, ovoid ; fruit ovate, 4-anglcd, the angles armed with tubercular 

 spines, pointed by the persistent bent style. — South Florida. — Leaves l'-2' 

 long. Spikes 6' - 9' long, terminal and in the forks of the stem. 



2. VERBENA, L. Vervain. 



Calyx tubular, .5-ribbed, .5-toothcd. Corolla salvcr-shapcd, bearded in the 

 throat ; the limb somewhat bilabiate, ."j-lobcd. Stamens 4, didynamous, included. 

 Stigma 2-lobcd. Ovary 4-ceIlcd. Fruit of 4 separate 1-scedcd nutlct.s. — Herbs, 

 with sciTatc or |)iimately divided leaves, and mostly snuill flowers in lengthen- 

 ing slender spikes. 



