§ 2. Anthers with no broad connective, the cells vertical; sterile filaments tipped with a head; hairy apparently annual plants, with erect rigid and more simple stems.
5. G. pilòsa, Michx. Leaves ovate or oblong, sparingly toothed, sessile (½´ long); flowers nearly sessile; corolla white, 3–4´´ long, scarcely exceeding the calyx.—Low ground, N. J. to Fla. and Tex.
13. ILYSÁNTHES, Raf.
Calyx 5-parted, nearly equal. Upper lip of corolla short, erect, 2-lobed; the lower larger and spreading, 3-cleft. Fertile stamens 2, included, posterior; the anterior pair sterile, inserted in the throat, 2-lobed, without anthers; one of the lobes glandular, the other smooth, usually short and tooth-like. Stigma 2-lobed. Capsule ovate or oblong, many-seeded.—Small and smooth annuals, with opposite leaves, and small axillary (purplish) flowers, on filiform naked pedicels, or the upper racemed, produced all summer. (Name from ἰλύς, mud, or mire, and ἄνθος, flower.)
1. I. ripària, Raf. (False Pimpernel.) Much branched, diffusely spreading (4–8´ high), or at first simple and erect, leafy; leaves ovate, rounded, or oblong, sparingly toothed or entire, the upper partly clasping; corolla 3´´ long. (I. gratioloides, Benth.)—Wet places; common.
14. MICRÁNTHEMUM, Michx.
Calyx 4-lobed or 4- (rarely 5-) parted. Corolla short, 2-lipped, with the upper lip considerably shorter than the lower, or 1-lipped, the upper lip obsolete; lower lip 3-cleft, the middle lobe longest. Stamens 2, anterior, the short filaments with a glandular (mostly basal) appendage; anthers 2-celled, didymous; no sterile filaments. Style short; the stigma 2-lobed. Capsule globular, thin, with a very delicate or evanescent partition, several–many-seeded.—Small, smooth, depressed and tufted or creeping annuals, in mud or shallow water, with opposite and entire rounded or spatulate sessile leaves, and minute white or purplish flowers solitary in the axils of some of the middle leaves (usually one axil floriferous, that of the other leaf sterile). (Name formed of μικρός, small, and ἄνθεμον, flower.)
1. M. Nuttàllii, Gray. Branches ascending, 1–2´ high; leaves obovate-spatulate or oval; peduncles at length recurved, about the length of the calyx, which is bell-shaped, 4-toothed and usually split down on one side, in fruit becoming pear-shaped; middle lobe of the corolla linear-oblong, nearly twice the length of the lateral ones; appendage of the stamen nearly as long as the filament itself; stigmas subulate.—Tidal mud of rivers, N. J. to Fla. Aug.–Oct.
Calyx 4-parted. Corolla somewhat bell-shaped, variously 2–4-lobed or cleft. Stamens 2, inserted just below the upper sinuses, occasionally with another pair from the other sinuses, exserted; anther-cells not confluent. Style slender; stigma simple. Capsule flattened, rounded, obtuse or notched, 2-celled (rarely 3-lobed and 3-celled), many-seeded, loculicidal; the valves cohering below with the axis.—Perennial herbs, with the simple stems beset with partly clasping bract-like alternate leaves, the root-leaves rounded and petioled, crenate. Flowers in a raceme or spike, bracteate. (Name from σύν, together, and θυρίς, a little door; in allusion to the closed valves of the pod.)