Protologue Description: ANTENNARIA EUCOSMA n. sp., argenteo-sericea plus minusve stolonifera; stolonibus gracilibus procumbentibus paullo sunteraneis bracteosis, bracteis paucis brunneis; caule florifero 8-25 cm. alto sericeo-tometoso; foliis utrinque sericeo-tometosis acutis vel breve acuminatis apice obtuse callosis, basilariis erectis lanceolatis vel oblanceolatis rare ellipticis petiolatis 3-nerviis 5-16 cm. longis 5-15 mm. latis, caulinis 4-7 valde minuantibus, superioribus lineari-attenuatis 7-20 mm. longis; corymbo denso vel glomeruliformi; capitus foemineis 3-10, involucro 7-10 mm. longo basi lanato, bracteis exterioribus ovatis vel oblongis, interioribus lanceolato-linearibus, omnibus apice scariosis conspicue brunneis vel castaneis, stylis brunneis vel purpurascentibus; capitulis masculis similinus minoribus, involucro circa 6 mm. longo, pappi setis apici paulo incrasatis usque ad apicem serrulatis.
Silvery sericerous, more or less stoloniferous; stolons (and root stocks) slender, procumbent, slightly subterranean , with a few brown scaly bracts and a tuft of lontg erect terminal leaves: flowering stem slender, 8-25 cm. high, silky tomentose: leaves silky-tomentose acute to short-acuminate, with a blunt callous tip; the basal and those of the stolons upright, lanceolate to oblanceolate, rarely elliptical, tapering gradually to a distinct petiole, 3-nerved (2-) 5-16 cm. long, 5-15 mm. broad; the 4-7 cauline rapidly diminishing in size; the uppermost linear-attenuate, 7-20 mm. long: corymb dense or glomulerate: pistillate heads 3-10; th involucres7-10 mm. high, lanate at base, the outer bracts ovate or oblong, the inner lance-linear, all with conspicuous brown or castaneous scarious tips: styles dark-brown or purple: staminate heads similar, smaller; the involucres about 6 mm. high; papus-bristles slightly thicked upward, serrulate to the tip.-NEWFOUNDLAND: abundant on dry limestone barrens, upper slopes and tablelands, altitude 200-300 m., Table Mountain, Port au Port Bay, August 16, 1910, Fernald and Wiegand, no 4144 (TYPE in Gray Herb.).