This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Club 18: 365. 1891. H. boreale Bicknell, Bull. Torr. Club 22: 213. 1894.
Perennial, sometimes stoloniferous; stem-terete or slightly 4-angled, upright from a usually assur-gent base, simple or branched, 1'-18'high. Leaves elliptic, oval, oblong, or linear-oblong, 3"-16" long, 1"-4" wide, sessile or slightly clasping, obtuse, mostly 3-nerved, those of the lower part of the stem commonly much smaller than the upper and closer together; cymes few-several-flowered, leafy-bracted; flowers about 2 1/2" broad; sepals narrow, obtuse; capsules oblong, obtuse or obtusish, apic-ulate, 2"-2 1/2" long, purple, cross-wrinkled, longer than the sepals; seeds 3-5 times as long as wide, pale, longitudinally furrowed and finely cross-lined.
Hypericum mutilum L. Sp. Pl. 787. 1753. Ascyrum Crux-Andreae L. Sp. Pl. 787. 1753.
Usually annual, slender, erect or ascending. generally tufted, abundantly branched, 6'-2 1/2° high. Branchlets 4-angled; leaves oblong or ovate, sessile, clasping, obtuse, 4"-14" long, 2"-7" wide, 5-nerved at the base; cymes many-flowered, terminal, subulate-bracted; pedicels slender, 1"-6" long; flowers V-2" broad, light orange yellow; sepals foliaceous, linear, lanceolate or oblanceolate, much shorter than or slightly longer than the petals; stamens 5-12; styles 3; capsule ovoid, pointed, 1-celled, 1"-2" long, somewhat longer than the sepals.
In low grounds, Nova Scotia to Manitoba, Kansas, Florida and Texas. Ascends 3000 ft. in Virginia. July-Sept.
Annual, erect, simple or sparingly branched, 10'-3° high. Leaves ovate, or the lower oval, cordate-clasping, often distant, 4"-10" long, 2"-4" wide, acute, or the lower obtuse, 3-7-nerved at the base; cymes terminal, loose, subulate-bracted; flowers numerous, 1"-2" broad; sepals lanceolate, acuminate, equalling or shorter than the petals and generally somewhat shorter than the I-celled ovoid capsule; styles 3; stamens 10-12; capsule about 2" long.
In low grounds, southwestern New Jersey and Delaware to Ohio, Minnesota, Arkansas, Louisiana and Texas. July-Sept.