Oedeb ST.— ACANTHACE^. 633 



B. Crista-gdlli L. Mostly glabrous ; *1vb. oblong or lanceolate) ; cor. scarcely a 

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

 than long. — Meadows, Plymouth, Ma.S3. 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. Eyebmght. (Named for Euphrosine, one of 

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

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

 lip spreading, Irifid, palate not; folded; stamens didynamous, a.scending 

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

 opposite lvs. and the fls. in spikes. 



E. ofSoinalis L. Lvs. ovate or oblong, the cauline obtuse, crenate, floral (or- 

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

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

 and Oau., rare (common in Europe). Plant branched, slender, 2 to C high. Lvs. 

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



35. MELAMPY'RUM, L. Cow Wheat. (Gr. iiiXag, black, irvpoq, 

 ■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 lvs. Fls. 

 solitary in the upper axils. 



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

 ally broader and toothed at base ; fls. axillary, distinct ; cal. teeth slender, half 

 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 14-' by 3 to 5", the 

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

 obtuse point. Fls. in the axils of the upper leaves, yellowish, slendei', the corolla 

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

 European variety in its more slender corolla.) 



Ord?r LXXXVn. ACANTHACE^. Acanths. 



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



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 tho tube of the corolla. Fruit a 2-ceUedi 4 to 12-seeded capsule. 



Seeds supported by hooks or cup-sliaped processes of the placenta^ exalbuminous. 



G&nera 155, /ipeeies 1450, cbiefly tropical, a few only, extending into tlie llnited States. Thoy 

 are mostly destitute of active properties, and in aspect mere -weeds. Yet ainon^ tlieni are many 

 remarkable for their be.anty. Acanthus mollis is celebrated as having, by its leaves, suggested 

 the stylo of tho Corinthian capital in architecture. 



STTBORDBKS AND GENERA. 

 I. ANECMATACANTHE.^. Seeds destitute of booked supports, (a) 



a Corolla regular. Seeds few, adnate to a cup instead of a hook Tiiukbebgia. 1 



a Corolla bilabiate, Seedsmany, with papilla) instead of hooks Elytkabia. 9 



IL ECIIMATACANTIIE^ Seeds subtended by hooked processes, (b) 



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



C Anthers 2-spurred at base. Capsule 4-8eeded in tho middle . .' Colopiianeb. 3 



O Anthers not spurred. Capsule 2 to 16-seedcd from tho middle DiPTBUACANTnos. 4 



C Anthers not spurred. Capsnl* 12 to 16-seeded from the base CiivPuiACAKmDS. 6 



b Corolla bilabiate, ringent. Statnens4. Capsule co -seeded from the base.HvGuopHiLA. 6 



b Corolla bilabiate. Stamens2. — Corolla resupinate, upper lip 3-toothed Dicliptkba. 7 



— Corolla straight, lower lip 8-toothed. Wild.RiiTTtGM)6eA. 8 

 — Corolla straight, lower lip S-partcd. Cult.CYETANTnFB * o 



