458 ORDER X0.-SCltOPnULARIACE.ffl. 



Genus IX.— LINDER'NIA. 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. Qratiola tetragona. 



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

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

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

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



Genus X.— MICRAN'THEMUM 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. If. Through the autumn. Very common. 3 — 6 

 inches. Round-leaved Micranthemum. 



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

 Leaven 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 

 verticillate, by fours or fives, lanceolate, acute, serrate, pubescent be 

 neath. Flowers in long, axillary spikes. Corolla tubular. Style long, 

 persistent. — White. If. June — Aug. Mountains. 2 — 3 feet. 



2. V. America'na, (Schw.) Glabrous; stem decumbent, assurgent. 

 Leaves ovate, petiolate, thick, serrate, subcordate at the base. Racemes 

 opposite, long. Capsule orbiculafe, obtuse, emarginate. — Blue. 2f. 

 May — June. Damp places. 1 — 2 feet. 



3. V. peregri'na, (Pursh.) Stem erect, terete, glabrous, frequently 

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



