ORDER 87. ACANTHACE.<E. 533 



R. Clista-galli L. Mostly glabrous; Iva. oblong or lanccolato; cor. scarcely a 

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

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

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

 rough. Fls. axillary, crowded into a leafy spike. Cal. inflated, contracted at the 

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

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

 Jl. Eur. 



34. EUPHRASIA, L. EYEBRIGHT. (Named for Euphrosinc, one of 

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

 olla galeatc, concave, apex 2-lobecl, 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 Ivs. and the iis. in spikes. 



33. officinalis L. Lvs. ovate or oblong, t!io caulinc obtuse, crenate, floral (or 

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

 cor. with its lobes deeply emarginate. (p A diminutive tenant of the White Mts. 

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

 1 to 3'' long. Fls. bluish white, 3 ' long. 



35. MELAMPY'RUM, L. Cow WHEAT. (Gr. /tOof, black, Trvpfo 

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

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

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

 seeds 1 to 4, cylindric-oblong, smooth. Herbs with opposite Ivs. Fls. 

 solitary in the upper axils. 



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

 ally broader and toothed at base; tie. axillary, distinct; caL teeth slender, half 

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

 site branches, 8 to 10' high, round, erect. Lvs. opposite, 1 to H' 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 the upper leaves, yellowish, slender, the corolla 

 twice the length of the calyx. Jl. (M. Amcricanum MX. differing from the 

 European variety in its moro slender corolla.) 



ORDER LXXXVII. ACANTHACE^E. ACANTHADS. 



Herbs or shrubs with opposite, simple leaves and regular, bracted flowers. Calyx 

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

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

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

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



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

 fire mostly <K-stitnte of active properties, and in aspect mere weeds. Vet among them arc inanj 

 remarkable for their beauty. Acanthus inollis is celebrated as having, by its leaves, suggested 

 the style of the Corinthian capital in architecture. 



SUBORDERS AND GENERA. 



I. ASECMATACANTHE^E. Seeds destitute of hooked supports, (a) 



a Corolla regular. Seeds few, adnate to a cup instead of a hook TIIUNBERGIA.. J 



a Corolla bilabiate. Seeds many, with papilhe instead of hooks KLVTHAEIA. 2 



II. ECHMATACANTIIE^E. Seeds subtended by hooked processes, (b) 



b Corolla funnel-form, subregular stamens didynamous. (UL-ELLIE.E.) (c) 



C Anthers 2-spurred at base. Cai>sulc. 4-sceded in the middle CALOPHANES. 3 



C Anthers not spurred. Capsule 2 to IG-seeded from the middle DUTBKACANTIIDS. A 



C Anthers not sparred. Capsule 12 to IC-seeded from the base CKYIMIIACANTIIUS. 6 



b Corolla bilabiate, ringcnt. Stamens 4. Capsule oo -seeded from thobase.HYGi:opini.A. 



b Corolla bilabiate. Stamens 2. Coroliaresnpinate, upper lip 3-toothcd.. . .DICUPTE'RA. 7 



Corolln straight, lower lipG-toothed. "\Vild.RiiYTtoT.ossA. 8 



^-Corolla straight, lower lip 3-parted. Ctilt.CYKTANTHEKA.8 



