Order 87.— ACANTHACE^E. 533 



R. Crista-g&lli L. Mostly glabrous; lvs. oblong or lanceolate; eor. ecarcely a 

 third longer than the calyx; appendages of the galea trausversoly ovate, broader 

 than long. — Meadows, Plymouth, Mass. to Are. Am. St. a foot high, smooth, 

 branching. Lvs. opposite, nearly sessile, cordate-lanceolate, acutely serrate, 

 rough. Pis. axillary, crowded into a leafy spike. Cal. inflated, contracted at tho 

 mouth, with 4 nearly equal teeth, and much shorter than tho yellow, ringent 

 corolla, but becoming very largo and inflated in fruit, rattling with the ripe seeds. 

 Jl. § Eur. 



34. EUPHRASIA, L. Eyebrigiit. (Named for JEJuphrosine, one of 



the Graces, meaning cheerfulness.) Calyx 4-clcft ; upper lip of the cor- 

 olla galeate, concave, apex 2-lobed, the lobes broad and spreading', lower 

 lip spreading, trifid, palate not folded ; stamens didynamous, ascending 

 beneath the galea ; capsule oblong, compressed, co-seeded. — Herbs with 

 opposite lvs. and the fls. in spikes. 



E. officinalis L. Lvs. ovate or oblong, tho cauline obtuse, crenate, floral (or 

 bracts) acute, cut-serrate with cuspidate teeth ; cal. lobes subequal ; lower lip of 

 cor. with its lobes deeply cmarginate. — (J) A diminutive tenant of the White Mb. 

 and Can., rare (common in Europe). Plant branched, slender, 2 to G' high. Lvs. 

 1 to 3'' long. Pis. bluish white, 3" long. 



35. ffiELAMPY v RUM, L. Cow Wheat. (Gr. p&Xa?, blade, -vpoi;, 

 wheat; the seeds blacken the flour of wheat if ground with it.) Calyx 

 4-clcft ; upper lip of the corolla compressed ; the margin folded back ; 

 lower lip grooved, trifid ; capsule 2-cellcd, oblique, opening laterally ; 

 seeds 1 to 4, cylindric-oblong, smooth. — Herbs with opposite lvs. bis. 

 solitary in the upper axils. 



M. pratense L. Lvs. linear and lanceolate, petiolate, glabrous, tho upper gener- 

 ally broader and toothed at baso ; fls. axillary, distinct ; cal. teeth slender, halt- 

 as long as the corolla. — (J) Inhabits woods, Can. to Ga. W. to Ky. St. with oppo- 

 site branches, 8 to 10' high, round, erect. Lvs. opposite, 1 to 1-J-' by 3 to 5", the 

 floral ones broader, with (or without) setaceous teeth at base and tapering to an 

 obtuse point. Fls. in the axils of tho upper leaves, yellowish, slender, the corolla 

 twice the length of the calyx. Jl. (M. Americaiium Mx. differing from tho 

 European variety in its more slender corolla.) 



Order LXXXVII. ACANTHACEJL Acantiis. 



Herbs or slirubs with opposite, simplo leaves and regular, bractcd flowers. Calyx 



pentamerous, equal or unequal, imbricated in the bud. Corolla 5-merous, tubular 



below, limb more or less bilabiate, convoluto in bud. Stamens didynamous or dian- 



drous, inserted on the tubo of tho corolla. Fruit a 2-celled, 4 to 12-seeded capsule. 



Seeds supported by hooks or cup-shaped processes of the placenta 1 , exalbuminous. 



Genera 155, species 1450, chiefly tropical, a few only, extending into the United States. They 

 nre mostly destitute of active properties, and in aspect mere weeds. Yet anion;; them nro ninny 

 remarkable for their beauty. Acanthus mollis id celebrated as having, by its leave?, suggested 

 tho style of tho Corinthian capital in architecture. 



SUBORDERS AM) GENERA. 



I. ANECMATACANTIIE/E. Seeds destitute of hooked supports, (a) 



a Corolla regular. Seeds few, adnate to a cup instead of a hook TiiL'xnsitGiA. 1 



a Corolla bilabiate. Seeds many, with papillia instead of hooks Llytraeia. 2 



II. ECIIMATACANTHEJ3. Seeds subtended by hooked processes, (b) 



b Corolla funnel-form, subregular stamens didynamous. (Ruellie.e.) (c) 



c Anthers 2-spurrcd at base. Capsule 4-seedod in tho middle CoLorriAXES. 5 



C Anthers not spurred. Capsule 2 to lG-seeded from the middle Diptei;acastuis. 4 



C Anthers not spurred. Capsule 12 to 10-seeded from the base Ceyi'UIAcanthus. 5 



b Corolla bilabiate, ringent. Stamens 4. Capsule 00 -seeded from the base.IlYOSOPiHLA. C> 



b Corolla bilabiate. Stamens 2. — Corolla resupinate, upper lip S-toothed. . . .Dkxiptf.isa. 7 



— Corolla straight, lower lip 8-toothod. Wild.IiiirTiei.ossA.. R 



— Corolla straight, lower lip 3-partcd. Cult.CYBTANTHJtKA. !» 



