ACANTHACEjE. ISO' 



-2. riiry'iua. Flowers In loose slender spikes, rc^CMdjn/ruji. Calyx 

 cylindrical, 2-lipped, the upper lip of three slender teeth. 

 Corolla 2-lipped. Ovary 1-oeIled and 1-seeded. 



1. VERBE'XA, L. VERVAIN. 



1. V. hasta'ta, L. (Blue Vervain.) Stem 3-5 feet high. 

 Leaves oblong-lanceolate, taper-pointed, serrate. Spikes of 

 purple flowers 'dense, erect, coi'ymbed, or panicled. — Low 

 meadows and fields. 



2. V. urtieifo'lia, L. (Nettle-leaved V.) Stem tall. 

 Leaves ohlong-ovate, acute, coarsely serrate. Spikes of 

 small white flowers very slender, loosely panicled. — Fields 

 and roadsides. 



3. V. angUStifO'lia, Michx. Stem lam. Leaves narrowly 

 lanceolate, tapering at the base, sessile, roughish, slightly 

 toothed. Flowers purple, in a crowded spike. — Dry soil. 



4. V. bracteo'Sa, Michx. Stem spreading or procum- 

 bent, hairy. Leaves wedge-lanceolate, cut-pinnatifid or 3- 

 cleft. Spikes single, thick, sessile, leafy-bracted, the bracts 

 longer than the small purple flowers. — S. W. Ontario. 



8. PHUY'lUA, L. LOPSEED. 

 P. LeptOStaeh'ya, L. Corolla purplish or pale rose- 

 coloured. Stem slender and branching, 1-2 feet high. 

 Leaves ovate, coarsely- toothed. — Woods and thickets. 



Order LXIL ACANTHA'CE.ffi. (Acanthus Family.) 



Herbs (with us), with opposite leaves, diandrous (or didy- 

 namous) stamens, inserted on the tube of the 2-lipped corolla, 

 and a 2-celled and several-seeded capsule. Seeds flat, sup- , 

 ported by hooked projections of the placentas. Flowers 

 commonly much braoted. Calyx 5-oleft. Eepresented with 

 us by the single genus 



DIANTHE'R.4, Gronov. Water-Willow. 

 D. America'na, L. A perennial herb growing in water 

 or wet places, with entire leaves and purplish flowers in 

 oblong, dense, long-peduncled, axillary spikes. Corolla 



