Hieracium robinsonii

Plants 10-35+ cm. Stems proximally piloso-hirsute (hairs 1-3+ mm) and stellate-pubescent, distally piloso-hirsute (hairs 0.5-1+ mm) and stellate-pubescent. Leaves: basal 2-4, cauline (2-)4-10; blades (often purple-mottled) oblong to lanceolate, 20-80 × 7-20+ mm, lengths 3-4 times widths, bases cuneate, margins usually dentate, sometimes entire, apices acute to acuminate, abaxial faces glabrous or piloso-hirsute (especially midribs), adaxial glabrous or stellate-pubescent. Heads 1-5(-10) in ± corymbiform arrays. Peduncles piloso-hirsute and stellate-pubescent (not, or rarely, stipitate-glandular). Calyculi: bractlets 10-16. Involucres campanulate to obconic, 10-15 mm. Phyllaries 25-35, apices acuminate, abaxial faces stellate-pubescent and stipitate-glandular. Florets 30-50+; corollas yellow (lengths unknown). Cypselae columnar, 3-5 mm; pappi of ca. 30, stramineous bristles in ± 2 series, ca. 6 mm.

Flowering Jul-Aug. Stream banks and lake shores, sands and clays, rock crevices; 10-300+ m; N.B., Nfld. and Labr. (Nfld.), N.S., Que.; Maine, N.H.

Similar to no. 8 [Hieracium lachenalii C. C. Gmel.], but smaller, 1-3.5 dm; lf-blades to 8 נ2 cm; basal lvs persistent or deciduous; spreading hairs of the peduncles glandless, often few; heads solitary or few (to 10); invol bracts stellate and shortly hispid with blackish, glandless or gland-tipped hairs, gradually tapering to a very sharply pointed tip; achenes 3-5 mm. Ledges and rock- crevices along streams; n. N.H. to Nf. and Que. June-Sept.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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