328 SCROPHULARIACEAE. 



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

 nearly closing the throat. Stamens 4, didynamous, 

 ascending, included; filaments and style filiform. Cap- 

 sule ovoid or globose, opening by usually 3-toothed pores 

 or slits below the summit. Seeds numerous, rugose, 

 angled or sometimes winged. 



1. L. canadensis (L.) Dumont. (Wild Toad-flax.) Biennial 

 or annual, glabrous; flowering stem erect or ascending, very slender, 

 simple or branched, 2-7 dm. high, the sterile shoots spreading or 

 procumbent, leafy; leaves linear or linear-oblong, 1-5 cm. long, 

 entire, sessile; flowers 6-8 mm. long in slender long racemes; pedi- 

 cels 4-6 mm. long, erect and appressed in fruit, minutely bracted 

 at the base; calyx-lobes lanceolate, about equaling the capsule; 

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

 palate white, corolla otherwise blue. 



Occasional in cultivated fields, especially in sandy soil. 



3. ANTIRRHINUM L. Snap-dragon. 



Annual or perennial herbs, with alternate leaves or the 

 lower opposite, and mostly rather large flowers in ter- 

 minal racemes or solitary in the upper axils. Calyx 

 5-parted. Corolla irregular, gibbous or saccate 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, didynamous, in- 

 cluded; filaments filiform or dilated above. Style fili- 

 form. Capsule obovoid or globose, opening by chinks or 

 pores below the summit. Seeds numerous. 



Herbs with all but the lowest leaves alternate. 

 Herbage glandular-villous or glandular- 

 pubescent throughout. 

 Flowers short-pedicelled or subsessile, 



without prehensile branchlets, 1. A. glandulosum. 



Flowers on slender pedicels usually 

 longer than the flowers, with pre- 

 hensile branchlets. 

 Leaves nearly all distinctly petioled. 2. A. nuttallianum. 

 Leaves all sessile or nearly so. 3. A. subsessile. 



Herbage not glandular-villous or glandular- 

 pubescent throughout. 

 Pedicels shorter than the calyx. 4. A. coulterianum. 



Pedicels slender, much elongated and 



tortile. 5. A. strictum. 



Shrub with opposite or verticillate leaves. 6. A . speciosum. 



\. A. glandulosum Lindl. Stems stout, erect, 1-L5 m. high, 

 glandular-pubescent and viscid throughout, destitute of prehensile 



