1. J. Hutchínsiæ, Dumort., var. Sullivántii, Spruce. Subdichotomously branching; leaves dark olive-green, subimbricate, obliquely ovate, acute, entire or subrepand; lower lobe saccate, rather remote from the stem, not spurred as in the European form; underleaves roundish, serrate or entire; involucral leaves bifid, serrate; perianth triangular-obpyriform. (Frullania Hutchinsiæ, Nees, in part.)—Wet rocks, N. Eng. to S. C.; more common in the mountains.
3. LEJEÙNEA, Libert. ([Pl. 24.])
Leaves decurrent at the folds, the lower lobe incurved and ventricose; underleaves usually present, entire or bifid. Archegonium with a slender persistent style, solitary on a usually very short branch; the perianth free from the involucral leaves, oval or oblong, terete or angular, variously carinate, cristate, or ciliate. Capsule globose, 4-cleft to the middle, the valves recurved. Spores large (40–50 µ broad), globose or oblong, tuberculate. Antheridia at the base of ordinary leaves or in the axils of the leaves of a spike-like branch.—Otherwise as Frullania. (Named for A.-L.-S. Lejeune, a French botanist.)
[*] Underleaves entire.
1. L. clypeàta, Sulliv. ([Pl. 24.]) Stems procumbent, somewhat pinnately branched, ¾–1´ long; leaves whitish-green, round-ovate, cellular-crenulate, deflexed; lower lobe flat, oblong-quadrate; underleaves round-quadrate; monœcious; involucral leaves larger than those of the stem, the perianth round-obovate, 2–3-carinate dorsally, 1-carinate ventrally, the keels rough. (L. calyculata, Tayl.)—On rocks and trees; common south and westward.
[*][*] Underleaves bifid; leaves entire.
2. L. serpyllifòlia, Libert, var. Americàna, Lindb. Stems long, somewhat branching, pale, pellucid and fragile; leaves rather remote, flat, opening from a basilar sac, scarcely decurved, obliquely roundish-ovate, obtuse, often slightly repand; underleaves about half as large, round-oval with a broad obtuse sinus and acute lobes; monœcious; the obovate-clavate perianth on a lateral branch. (L. cavifolia, Aust.)—On cedars, etc., Catskill Mts. (Cleve), Belleville, Ont. (Macoun), and southward; rather common.
3. L. lùcens, Tayl. Whitish, filiform, pinnately branched; leaves remote, rarely subimbricate, obliquely ovate-triangular, rounded or obtuse, semi-cordate at base; lower lobe ovoid, acute or apiculate; underleaves ½ as large as the lateral, round-oval, deeply bifid, the lobes broad-subulate; diœcious; involucral leaves rather longer, with lanceolate lobes; perianth scarcely emersed, broadly pyriform, 5-carinate. (L. cucullata, Sulliv.; not Nees.)—Near Cincinnati; moist rocks, Alleghany Mts. and southward (Sullivant). Minute and flaccid.
[*][*][*] Underleaves obsolete; leaves muriculate-denticulate.
4. L. calcàrea, Libert. Very minute; stems slender, loosely branching; leaves ovate, falcate-decurved, sinuate-complicate at base; monœcious; involucral leaves bifid, the divisions entire; perianth on a very short lateral branch, pyriform-clavate, acutely 5-angled, the margin echinate-muriculate. (L. echinata, Tayl.)—On rocks and roots of trees; rather common. (Eu.)