Protologue Description: *Agalinis acuta Pennell, sp. nov.
"Annual. Plants light green, not tending to blacken in drying. Stem 1-4 dm. tall, simple or moderately branched, rather conspicuously striate four-angled. Leaves opposite, linear, slightly to moderately scabrous above; those of the stem 1-2.5 cm. long, 0.6-1.3 mm. wide. Pedicels slender, in flower 5-15 mm. long, in fruit, 12-20 mm. long, 1-2(-3) times the length of the bracts. Calyx-tube 3mm. long, evidently reticulate-veiny (firmer in texture than in A. decemloba), two thirds - three quartersthe length of the capsule, its lobes 0.5-1 mm. long, triangular-acuminate, not or scarcely callose. Corolla 10-13 mm, long, membranous, its tube 7-9 mm. long, its lobes 3-4 mm. long, retuse to emarginate, all spreading; mwithin pubescent below sinus and over entire width of basal portions of posterior lobes; posterior lobes ciliate, anterior finely ciliolate; "rose-pink" (not seen fresh). Filaments lanose toward apex, anterior more densely so; anther sacs lanose with white hairs on the valvular surface, glabrous on both sides. Style glabrous. Stigma 1-1.2 mm. long. Capsule 3.8-4.2 mm. long, ovoid, yellowish-brown; testa finely reticulated.
"Type: dry sandy downs, Edgartown, Martha's Vineyard, Massachusets, collected in flower September 12, 1901, M.L. Fernald, 45 in United States National Herbarium; cotypes in Gray Herbarium and Herbarium New York Botanical Garden.