Pseudognaphalium macounii

(Greene) Kartesz in J. T. Kartesz and C. A. Meacham

in J. T. Kartesz and C. A. Meacham, Synth. N. Amer. Fl., nomencl. innov. 30. 1999.

Common names: Macoun’s rabbit-tobacco gnaphale de Macoun
Basionym: Gnaphalium macounii Greene Ottawa Naturalist 15: 278. 1902 Gnaphalium decurrens Ives 1819
Treatment appears in FNA Volume 19. Treatment on page 421. Mentioned on page 416, 422.

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.


Phenology: Flowering July–Oct.
Habitat: Dry, open habitats, pastures, open woods or edges, roadsides
Elevation: 50–2600(–3000) m

Distribution

V19-690-distribution-map.gif

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

Discussion

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.

Selected References

None.

Lower Taxa

None.
... more about "Pseudognaphalium macounii"
white +  and gray +
grayish;greenish +
glabrous +, glabrescent +  and stipitate-glandular +
scarious +
mostly ovate +  and lanceovate or linear +
indeterminate +  and determinate +
Guy L. Nesom +
(Greene) Kartesz in J. T. Kartesz and C. A. Meacham +
decurrent +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Gnaphalium macounii +  and Gnaphalium decurrens +
compound +  and simple +
mostly narrowly lanceolate;oblanceolate +
5-ribbed +, 3-ribbed +  and 2-ribbed +
muriculate +, papillate +  and smooth +
Macoun’s rabbit-tobacco +  and gnaphale de Macoun +
actinomorphic +
papillate-roughened +
not ridged +
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. +  and Mexico +
50–2600(–3000) m +
papillate-roughened +
winged +  and beaked +
dispersed +
Dry, open habitats, pastures, open woods or edges, roadsides +
singly +  and aggregated +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
campanulo-subglobose +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
cauline +  and basal +
rarely lanceovate +  and lanceolate +
flat +  and slightly revolute +
2-carpellate +
persistent +
Flowering July–Oct. +
in J. T. Kartesz and C. A. Meacham, Synth. N. Amer. Fl., nomencl. innov. +
bearing subulate enations +, hairy +  and bristly +
conic;more or less columnar +
4 +  and 6 +
exalbuminous +
decumbent +  and procumbent +
appendaged +  and truncate +
papillate +
Compositae +
Pseudognaphalium macounii +
Pseudognaphalium +
species +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
biennial +  and annual +
40 cm400 mm <br />0.4 m <br /> (90 cm900 mm <br />0.9 m <br />) +
shrub +  and subshrub +