DICOTYLEDONOUS PLANTS 203 



1. L. vulgaris, Miller. Butter-and-eggs, Jacob's Ladder, 

 Wild Flax. A perennial, erect, smooth herb, with a bloom, stem 

 1-2 ft. high. Leaves linear or lanceolate, 1-3 in. long, often 

 whorled. Racemes densely flowered. Sepals shorter than the spur. 

 Corolla yellow, |-1 in. long ; spur parallel to and as long as the 

 tube ; throat closed by a palate-like fold. Common in dry fields and 

 pastures and along roadsides ; introduced from Europe. 



2. L. canadensis, Dumont. Toad-flax. Biennial ; flowering 

 stems erect, slender, rarely branched, smooth, 1-2 ft. high, sterile 

 stems prostrate, with opposite or whorled leaves, 2-6 in. long. 

 Leaves linear, entire, sessile. Racemes erect, slender ; pedicels 

 erect, as long as the calyx. Corolla small, blue and white, the spur 

 thread-like, curved, longer than the pedicels. Capsule 2-valved, the 

 valves 3-toothed. On dry or cultivated ground E. 



III. ANTIRRHINUM, Toum. 



Annual or ^^^rennial herbs. Leaves entire, rarely lobed, 

 the lower ones opposite, the upper alternate. Flowers axillary 

 and solitary or racemed and bracted. Calyx 5-parted. 

 Corolla 2-lipped. The tube with a sac, the broad bearded 

 palate closing the throat. Stamens 4. Stigma with 2 short 

 lobes. Capsule 2-celled, the upper cell opening by 1 pore, 

 the lower by 2. 



1. A. majus, L. Snapdragon. Perennial; stem erect, smooth 

 below, glandular-downy above, 1-2 ft. high. Leaves linear to 

 oblong-lanceolate, entire, smooth, sometimes fleshy, sessile or short- 

 petioled. Flowers in a terminal raceme ; pedicels short, stout, 

 erect in fruit. Corolla lj-2 in. long, of many colors. Capsule 

 oblique, the persistent base of the style bent forward. Common in 

 gardens, cultivated from Europe, and often escaped.* 



IV. PENTSTEMON, Mitchell. 



Perennials, the stems branching from the base, unbranched 

 above. Leaves opposite. Flow^ers usually showy in a termi- 

 nal panicle. Calyx of 5 nearly distinct sepals. Corolla 

 tubular, the tube wide above and narrowed below ; 2-lipped. 

 Stamens 4, 2 long and 2 short, with a fifth antherless filament 

 as long as the others, its upper half bearded. Capsule ovoid, 

 acute. 



1. P. pubescens, Solander. Stem somewhat sticky-downy, 1-2 

 ft. high, Leaves varying from oblong to lanceolate, 2-4 in. long, 



