458 ORDER XC. SCROPHULARIACEjE. 



Genus IX— LINDER "SI A. L. 2—1. 

 (In honor of F. B. Von Linden.) 



Calyx pubescent, 5-leaved. Corolla bilabiate, 4-cleft ; the 

 upper lip short, reflexed, emarginate ; the lower lip 3-cleft, with 

 the segments oval, obtuse. Stamens 4, the two longest sterile. 

 Capsule 2-valved, 2-celled, many-seeded. 



1. L. dilata'ta, (Ell.) Stem procumbent, smooth, square. Leaves 

 oblong, ovate, amplexicaul, sparingly toothed. Flowers axillary, on 

 square peduncles, covered with glandular hairs. Corolla resupinate. 

 Stigma compressed. — Pale purple. 0. May — Sept. Around ponds. 

 6 — 8 inches. Gratiola tetragona. 



2. L. attenua'ta, (Muhl.) Stem procumbent or erect, square, gla- 

 brous. Leaves lanceolate and obovate, narrowed at the base. Ftooers 

 on erect peduncles, shorter than the leaves, axillary, solitary. — Purple. 

 0. May — June. "Wet places. 6 — 8 inches. L. refracta. 



Genus X.— MICRANTHEMUM. Mich. 2—1. 

 (From mikros, small, and anthos, flower.) 



Calyx 4-parted. Corolla 4-cleft, segments unequal. Sta- 

 mens 2. Capsule 1 -celled, 2-valved, many-seeded. 



1. M. orbicula'tum, (Mich.) Stem prostrate, creeping, glabrous, te- 

 rete. Leaves opposite, sessile, orbicular, abruptly narrowed at the base, 

 entire, obscurely 5-nerved. Flowers axillary, solitary, on short pedun- 

 cles; segments of the calyx slightly spatulate, the two upper ones 

 shorter. Corolla shorter than the calyx ; the lower segments elongated. 

 Stamens dilated at the base. Anthers globose, 2-lobed, white. Style 

 filiform. Capsule globose, 2-celled, 2-valved, many-seeded, with central 

 placentae. — White. 1$. . Through the autumn. Very common. 3 — 6 

 inches. Round-leaved Micranthcmum. 



2. M. emargina'tum, (Ell.) Stem prostrate or floating, creeping 

 Leaves sessile, oval, and obovate, entire, emarginate, obscurely 5-nerved. 

 Flowers smaller than the preceding, on very short peduncles. — White. 

 If Through the summer. Common in wet places. 



Large-leaved Micranthemum. 



Genus XL— VERONICA. L. 2—1. 

 (Origin of the name uncertain.) 



Calyx 4, rarely 5-parted. Corolla 4-lobed, unequal ; the 

 lower segments narrowest. Stamens 2. Capsule 2-celled, ob 

 cordate. Seed few. 



1. V. Virgin'ica, (L.) Stem erect, glabrous, slightly angled. Leaves 

 verticillatc. by fours or fives, lanceolate, acute, serrate, pubescent be- 

 neath. Flower* in long, axillary spikes. Corolla tubular. Style long, 

 persistent. — White, ll. Jane — Aug. Mountains. 2 — 3 feet. 



2. V. Americana, (Schw.) Glabrous; stem decumbent, assurgent. 

 Leaves ovate, j etiolate, thick, serrate, subcordate at the base. Racemes 

 opposite, long. Capsule orbicnlate, obtuse, emarginate. — Blue. If. 

 May — June Damp places. 1 — 2 feet. 



3. V. pereuiu na, (Porsh.) Stem erect, terete, glabrous, frequently 

 simple. Lower leaves opposite, oblong, toothed; the upper ones alter- 



