Pseudognaphalium macounii
Robert L. Carr

Flora of Oregon

Plants annual or biennial, 4–10 dm.

Stems pilose- or floccose-pubescent, stalked-glandular.

Leaves 2–10 cm, linear to lanceolate or oblanceolate, bases decurrent, surfaces contrasting in color, abaxially gray-tomentose, sometimes stalked-glandular on midveins, adaxially green, glabrous or scarcely tomentose, usually stalked-glandular.

Involucres 4.5–6 mm.

Phyllaries in 4–5 series, white or brownish, surfaces glabrous.

Outer florets 50–100; corolla tips yellow.

Inner florets 5–12.

Fruits 0.4–0.5 mm, brown; pappi white.

Open woodlands, grasslands, riverbanks, roadsides. Flowering Jul–Sep. 1000–2000 m. BW, Casc. CA, ID, WA; north to British Columbia, northeast to Nova Scotia, east to MA, southeast to NM, south to Mexico. Native.

Flora of North America

as described under Pseudognaphalium macounii

Annuals or biennials (often sweetly fragrant), 40-90 cm; taprooted. Stems stipitate-glandular throughout (usually persistently lightly white-tomentose distally). Leaf blades (not crowded, internodes mostly 5+ mm) lanceolate to oblanceolate, 3-10 cm × 3-13 mm (distal linear), bases not clasping, decurrent 5-10 mm, margins flat to slightly revolute, faces weakly bicolor, abaxial tomentose, adaxial stipitate-glandular, otherwise glabrescent or glabrous. Heads in corymbiform arrays. Involucres campanulo-subglobose, 4.5-5.5 mm. Phyllaries in 4-5 series, stramineous to creamy (hyaline, shiny), ovate to ovate-oblong, glabrous. Pistillate florets 47-101(-156). Bisexual florets 5-12[-21]. Cypselae not ridged, ± papillate-roughened.Flowering July-Oct. Dry, open habitats, pastures, open woods or edges, roadsides; 50-2600(-3000) m; Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask.; Ariz., Calif., Colo., Conn., Idaho, Ill., Ind., Maine, Mass., Mich., Minn., Mont., N.H., N.Mex., N.Y., Ohio, Oreg., Pa., S.Dak., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Mexico.Pseudognaphalium macounii is recognized by its stipitate-glandular, proximally glabrescent stems, bicolor and decurrent leaves, relatively large and many-flowered heads, and hyaline, shiny phyllaries. Reports of P. macounii from Texas are based on specimens of P. viscosum.

Photo images

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Herbarium specimens

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https://intermountainbiota.org/imglib/seinet/intermt/RENO_V/00111/111084_tn.jpg
https://botanydb.colorado.edu/COLO_V/01821/01821578_tn.jpg
https://botanydb.colorado.edu/COLO_V/01288/01288810_tn.jpg
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