504 SCROPHULARIAOE^E linaria 



ANTIRRHINUM 



a palate at the throat. Capsule opening by irregular perforations or 

 lacerate chinks not by normal valves. 



2 LINARIA Tourn. Juss. Gen. 120 (Toad-flax.) 



Herbs, or some exotic species shrubby, with alternate, or the 

 lower and those of sterile shoots opposite, leaves and yellow white 

 blue or purple flowers in terminal racemes or spikes. Caylx 5- 

 parted, the segments imbricated in the bud. Corolla bilabiate, 

 the upper lip erect, 2-lobed, outside of the lower one in the bud, 

 the tube spurred at the base, or the spur rarely wanting ; lower 

 lip spreading, 3-lobed, its base produced into a palate often nearly 

 closing the throat. Stamens 4 didynamous, not exserted. Cap- 

 sule ovoid or globose, opening by one or more mostly 3-toothed 

 pores or slits below the summit. Seeds numerous. Ours are 

 perennials by short rootstocks. 



L. vulgaris Mill, Gard. Diet. ed. 8, No. 1. Pale green and slightly- 

 glaucous: stems slender erect, very leafy, 1-3 feet high from short perenni- 

 al rootstock, glabrous or sparingly glandular-pubescent above: leaves linear, 

 sessile, entire, acute at both ends, mostly alternate 6-18 lines long; flowers 

 densely racemose, light yellow, 12-16 lines long, the spur of the erect corolla 

 somewhat darker ; the palet orange-colored : pedicels 2-4 lines long nearly 

 erect: calyx-segments oblong, acutish, about \% lines long : spur subulate, 

 nearly as long as the body of the corolla; middle lobe of the lower lip 

 shorter than the other 2: capsule ovoid : seeds rugose, winged. In waste 

 places. Introduced from Europe. 



L. Canadensis Dumont Bot. Cult. ii. 96. Glabrous : flowering stems 

 erect or ascending very slender simple or branched 4-30 inches high ; the 

 sterile shoots spreading or procumbent, very leafy : leaves linear-oblong, 4- 

 15 lines long, 3*>-l line wide, entire, sessile; those of the sterile shoots often 

 opposite : flowers blue, 3-4 lines long, in long slender racemes : pedicels 3-4 

 lines long, erect, in fruit appressed to the rachis, minutely bracted at the 

 base; calyx-segments lanceolate, acute or acuminate, about as long as the 

 capsule: spur of the corolla filiform, curved, as long as the tube or longer: 

 palate a white convex 2-ridged projection : capsule opening by 2 apical 

 holes, each becoming 3-toothed: seeds angled, wingless. On rocky banks, 

 Oregon to California and across the continent. 



3 ANTIRRHINUM Tourn. L. Sp. 612. 



Annual or perennial herbs with all or all but the lower leaves 

 alternate, and rather large flowers in terminal racemes or solitary 

 in the axils of the upper leaves or bracts. Calyx 5-parted, the 

 segments imbricated in the bud. Corolla irregular, gibbous or 

 saccate, but not spurred at the base, 2-lipped, the upper lip erect, 

 2-lobed; the lower spreading, 3-lobed, its base produced into a 

 palate nearly or quite closing the throat. Stamens 4, didynam- 

 ous, included ; filaments filiform, or dilated at the summit. Style 

 filiform. Capsule ovoid or globose, opening by chinks or pores 

 below the summit. Seeds numerous, not winged. 



A. leptaleum Gray Proc. Am. Acad, vii, 373. Viscid-villous : stem 

 erect 1-2 feet high from an annual root simple or branched : leaves linear- 

 lanceolate to linear, 6-18 lines long, entire, the lower ones on slender 

 petioles, the uppermost ones smaller and sessile : flowers on short pedicels 



