290 SCROPHULARIACE^. (fIGWORT FAMILY.) 



* * Leaves undivided, 



2. P. pubescens, Solander. Pubescent or smooth ; leaves lanceolate, 

 acute, serrate or entire, sessile or clasping ; the lowest ovate or oblong, tapering 

 into a slender petiole ; cymes spreading, few-flowered ; tube of the corolla grad- 

 ually dilated above the middle ; the lower lip longer than the upper ; sterile 

 stamen bearded down one side ; anthers smooth. (P. laevigatus, Soland., a 

 smooth form.) — Dry open woods and fence-rows, Florida to North Carolina, 

 and westward. June and July. — Stem 2° high. Lowest leaves 3' - 5' long. 

 Corolla 1' long, ])ale pui-ple. 



3. P. Digitalis, Nutt. Smooth or nearly so ; stem-leaves ovate-lanceolate, 

 serrate or entire, clasping ; the lowest oblong, narrowed into a petiole ; cymes 

 few-flowered, spreading, forming a narrow panicle ; tube of the corolla abruptly 

 dilated near the base ; the lips nearly equal ; sterile stamen bearded down one 

 side. — Dry soil, Georgia, Florida, and westward. July. — Stem 2° high. Co- 

 rolla 9" - 1 2" long, white or pale purple. 



Var. multiflorus, Benth. Larger (3° - 4° high) ; leaves thicker; cymes 

 many-flowered, forming a large spreading panicle; corolla smaller. — Pine bar- 

 rens, Florida. 



5. LINARIA, Juss. Toad-Flax. 



Calyx deeply 5-parted. Corolla personate, spurred at the base; the upper lip 

 emarginate or 2-lobed ; the lower 3-lobed ; the throat commonly closed by the 

 prominent palate. Stamens 4, didynamous. Capsule globose or ovoid, opening 

 at the apex, with few or several tooth-like valves, many-seeded. — Herbs, with 

 alternate or (on the radical branches) opposite orwhorled leaves, and axillary or 

 racemose flowers. 



* Slems ivith prostrate brunches at the base, which bear broader opposite or whorled 



leaves. 



1. L. Canadensis, Spreng. Smooth ; stem erect, slender, mostly simple; 

 leaves linear, flat, scattered ; those on the radical branches oblong ; racemes 

 straight ; pedicels erect, as long as the calyx ; lobes of the small (3" - 4") blue 

 and white corolla rounded ; spur filifonn, curved, as long as the pedicels. (An- 

 tirrhinum Canadcnse, L.) — Cultivated ground, common. April and May. 

 (D — Stem l°-2° high. 



2. L. Ploridana, n. sp. Stem smooth, ascending, paniculately much 

 branched ; leaves scattered, fleshy, terete, linear or club-shaped ; those on the 

 radical branches obovate ; racemes elongated, flexuous, glandular-hairy ; pedicels 

 spreading, 3-4 times as long as the calyx ; lobes of the small (2") blue corolla 

 truncate or emarginate ; spur very short. — Drifting sands near the coast, West 

 Florida. April and May. (g) — Stem 3' - 12' high. 



* * Prostrate branches none. 



3. L. vulgaris, Miller. Smooth ; stem erect, simple or branched ; leaves 

 alternate, linear or linear-lanceolate, crowded; raceme dense; flowers large (1' 

 long), yellow ; spur subulate ; seeds flattened, margined. — Waste places. North 

 Carolina, and northward. Naturalized. Aug. U — Stem 1°- 3° high. 



