20. AMPHIANTHUS, Torr. (Gr. both or twain, allu-ding to its two-fold inflorescence.) Calyx 5-parted ; corolla small, funnel form, limb 4-lobed, lower lobe larger, stamens 2, included; anthers 2-celled ; style lightly bifid, lobes acute ; capsule obcordate, compressed, valves scptiferous in the middle; seeds numerous.- Acaulescent, minute, with fls. both sessile and on scapes.
A. pusillus Torr. On wet rocks, Newton Co., Ga. (Leavenworth). A minute herb, with the lvs. nearly radical, linear, obtuse, entire, 1 to 2" long. Fls. white, hardly 1" long, some sessile among the leaves, others on simple, filiform peduncles 1' long. Mar., Apr.
21. LIMOSEL'LA, L. Mudwort. (Lat. limus, mud; its locality.) Calyx 5-cleft; corolla shortly campanulate, 5-cleft, equal; stamens approximating in pairs; capsule partly 2-celled, 2-valved,many-seeded.-- Minute aquatic herbs. Scape 1-flowcred.
L. tenuifolia Nutt. Acaulescent; lvs. linear, scarcely distinct from the petiole; scape as long as the leaves; cor. segments oval-oblong, shorter than the calyx.- R. I., Mass., N. Y., Penn. A minute plant, an inch in height, growing on the muddy banks of rivers. Leaves and flower-stalks radical. Flowers very small, blue and white. Aug.
22. SYNTHY'RIS, Benth. (Gr together, a door; sc. valves closed.) Calyx 4-parted ; corolla subcampanulate, segments 4, erect-speading or 0 ; stamens 2, inserted into the tube of the corolla, exserted; anther cells parallel, distinct; capsule compressed, obtuse or emarginate, loculicidal, seeds plano-convex.- N. American, with a thick root. Radical lvs. petiolate, cauline bract-like, on the scape-like stem, alternate. Fls. racemed or spicate.
S. Houghtoniana Benth. Hirsute, radical lvs. ovate, subcordate at base, crenulate, obtuse; scape erect, clothed with foliaceous bracts, dense-flowered above;
• cor. as long as the calyx, upper segment longer than the other very short ones.-
Dry hills, Wis. (Lapham). Lvs. 2 to 3' by 1 1/2 to 2', on petioles about an inch long, some of the leaves often suborbicular. Bracts. much smaller, ovate and ovato-lanceolato, clasping. Scape 9 to 12' high. Spike elongated in fruit.
23. DIGITA'LIS, L. Fox-glove. (Lat. digitabulum, a thimble.) Calyx 5-parted ; corolla campanulate, ventricous, upper lip reflcxed, spreading, middle segment of the lower lip broadest; capsule ovate, 2-celled, 2-valved, with a double dissepiment.-Herbs or shrubs of Europe and Asia. Lower lvs. crowded, petiolate, upper alternate. Fls. in showy racemes. Poisonous and medicinal.
§ Corolla tube subglobous, scarcely longer than the lower lip..............
Nos. 1, 2, 7
§ Corolla tube campanulate, twice longer than the lower lip................
Nos. 8, 4, 6
§ Corolla tuba subeylindric, twice longer than the lower lip...................
1 D. orientalis Lam. St. and lance-linear lvs. glabrous; spike interrupted, glandular-villous; pedicels very short; cal. segments ovate-lanceolate, acute; cor. pubescent, lower segments oblong, obtuse.- Bythinia. Height 3f. Corolla purplish, spotted.
2 D. ferruginea. Lvs. oblong-lanceolate,very smooth; rac many-flowered; cal. segments oval-elliptical, obtuse; cor. limb subglobous, woolly, lower segment ovate. - in Greece, Armenia and Circassia. Corolla rust-colored, 16" long, lower lip longest, densely bearded,†
3 D. purpurea L. Lvs. oblong, rugous, petiolate, crenate; cal. segtn. ovate oblong ; cor. obtuse, upper lip entire; ped. as long as the calyx.- Plant 2 to 3f high, with large, rough, downy lvs. Fls. numerous, in a long, simple spike, large, crimson, often white, with eye-like spots within. Jl ‡ † Eur.
4 D. grandiflora Allioni. Lvs. ovate or oblong-lanceolate, veiny, serrulate, amplexicaul; rac. tomentous, lax; cal. segments lanceolate, acute; cor. ventricous-campanulate, segments broader than long, lowest twice broader than the lateral.
in Europe. Plant 2-3f high. Flowers 1 1/2' long, yellow, varying to brownish or orange, † .
5 D. lutea L. Very smooth; lvs. oblong or lanceolate, denticulate; rac. secund, many-flowered; cal. segments lanceolate, acute; cor. glabrous,tube sub-ventricous, lower segment half as long again as the rest.- Europe. Stom 3f high. Flowers 8-10" long, yellow, varying to white, †
6 D. Thapsi, with mullein-like lvs. all radical and flat on the ground.
7 D. leucophaea, with very large, dense, leafy racemes of dusky white fls., and a few other species may bo found in gardens. There are also many hybrids, difficult of course, to determine.
24. VERON'ICA, L. Speedwell. (Perhaps named for St, Veronica.) Calyx 4-parted ; corolla subrotate, deeply 4-clcft, lower segments mostly narrow; stamens 2, inserted into the tube, exserted ; sterile fil. 0 ; capsule compressed, 2-sulcate, often obcordate, 2-cellcd, few-seeded.- Herbs or shrubs (the following species herbs). Lvs. opposite. Fls. solitary, axillary or in racemes, blue, flesh-colored or white. ;
Tall, ereot (18' to 4f). Fls. in dense terminal spikes. Corolla tube elongated..
Low, work (3 to 12'). Leaves opposite (at base). corolla tube very short (a)
a Racemes opposite, axillary. Capsule roundish, emarginate..............
Nos. 2, 3
a.Racemes alternate, axillary. Capsule not rounded, very flat............
Nos. 4, 5
a Racemes terminal, or the flowers axillary and not raceined. (b)
b Floral leaves like the rest, not longer than the recurved peduncles..
Nos. 6 - 8
b Floral leaves bractlike, longer than the erect peduncles, (c)
c Pernnial. Peduncles equaling or exceeding the calyx....................
Nos. 9, 10, 14
c Annual. Peduncles shorter than the calyx or none.............
1. V. Virginica L. Culver's Physic. Erects tall, glabrous; lvs. verticillate in 4s, 5s, or 6s, lance-ovate to lance-linear; spikes mostly several, paniculate.- Woods, thickets and barrens, Can. to Ga., W. to Iowa, A conspicuous plant arising 2-5f. Stem simple, straight, smooth, with whorls of acuminate, finely serrate leaves which are subpetiolate and glaucous beneath. Flowers numerous, nearly sessile, in spikes 3 to 10' long. Corolla white, tubular, pubescent inside. Stamens and style twice as long as the corolla, Jl (Leptandra Virginica Nutt.)