VERBENACE^-. (VEUVAIN FAMILY.) 33\> 



2. RUELLIA, L. (DiptkracAnthls, Nccs, & Ed. 2.) 



Calyx o-partuil. Coiullii fiiiiiiol-foriii, the spreading ample Ixjrdcr almost 

 equally and re<^ularly ."i-cleft, convolute in the bud. Stamens 4, included, di- 

 dynamous : cells of the .somewhat aiiow-shapcd anthers parallel and nearly 

 equal. Pod narrow, in our species (of the section Dii'Tkkacantiius) somewhat 

 flattened, contracted and seedless at the base, above 8- I2-.seeded. beeds with 

 a mucilaginous coat, when wet under the microscope cxhil)itiuy innumerable 

 tapering short bristles, their walls marked with rings or spirals. — Perennials, 

 with rather large and showy blue or purple flowers, mostly in axillary dusters, 

 sometimes also with small flowers precociously close-fertilized in the bud. Calyx 

 often 2-bracte()huc. (Named for the early herbalist, John Riulk.) 



1. R. cilidsa, Pursh. ///«)//« with soft whitish hairs (l*- 3° high) ; fotw* 

 imirhi srs-llc, oral or ovate-oblong (l'-2' long) ; flowers 1 -3 and almost sessile 

 in the axils; tube of the. corolla (I'- H' long) fully twice the lent/th of the setaceous 

 cahjx-hhes ; the throat short. (Dipteracanthus ciliosus, Nejis.) — Dry soil, Mich- 

 igan to Illinois, and southward. Jime-Scpt. 



2. R. Str^penS, L. Glabrous or sparlnfjlij pnhesrent (l°-4° high); leaves 

 uarroired at the Ikisc into (t petiole, ovate, obovate, or mostly oblong (2^' - .'3' long) ; 

 tube of the corolla {ahowt \' \on<r) little longer than the dilated portion, slir/htly 

 exceeding the hiiiceohite or linear calf/ r-lobes. (Dipteracanthus strepcns. Nets.) — 

 Flowers 1 -5 in each axil, rarely on a slender pt'diinclc, usually almost .sessile; 

 sometimes many and closely crowded, then mostly fruiting in the bud, (when it 

 is D. micninthns, EiifjeJm. <f- (Jr.). — Kich soil, Pennsylvania to Wisconsin, and 

 southward. July - Sej)t. 



Order 70. VERBEWACE^. (Vervain Family.) 



//p;-t.<j or sh-ii7).<f, irlth oppnuite leaven, more or fess 2-Upped or irregular 

 corolla, and didipiamonx .'Stamens, the 2-4-celled (in Phryma l-celled)//-MJ< 

 dnj or drupaceous, usualli/ splilting xchen ripe into as many l-seeded inde- 

 hi^cent nutlel.i ; difTerlng from the following order in the ovary not being 

 4-lobed, the style therefore terminal, and the plants seldom aromaric or 

 furni.shing a volatile oil. — Seeds with a straight embryo and little or no 

 albumen. — A large order in the warmer parts of the world, sparingly rep- 

 resented in cool regions. 



TrllJC I. VERBENE.3E. Ov.nry 2 - 4-cellc(l, and with an erect anatropous ovulein cacb 

 cdl : r.i.licle inforinr. 



1. Vtrbeiin. Flowers in spikes or heads. Ciilyx tuliular. Fruit splittinp into 4 nutlets. 



2. Lippla. Fluwers in spikes or lieiuls. Calyx short, 2-eleft. Fruit splitting into 2 nutlets. 



3. CalUciirpa. Flowers in axillary cynics. Calyx short. Fruit beiTy-like, with 4 nutlets. 

 Tribe II. PIIKYRIE^. Ovary I -celled : ovule erect, orthotropnus : radicle superior, 

 i. Phryiua. Flowers in slender spikes. Calyx cylindrical, 2 lip|>ed. Fruit an achcnium. 



1. VERBENA, L. V.kvain. 



Calyx tubular, a-toothed, one of the teeth often shorter than the others. Co 

 rolla tubular, often curved, salver-form; the border somewhat unequally 5-cleft. 



