Pseudognaphalium jaliscense

(Greenman) Anderberg

Opera Bot. 104: 147. 1991.

Common names: Jalisco rabbit-tobacco
Illustrated
Basionym: Gnaphalium jaliscense Greenman Proc. Amer. Acad. Arts 39: 96. 1903
Treatment appears in FNA Volume 19. Treatment on page 424. Mentioned on page 417, 425.

Annuals or biennials, 30–70 cm; taprooted. Stems (branched among heads) densely and persistently loosely woolly-tomentose-sericeous, not glandular. Leaf-blades narrowly lanceolate to nearly linear, 3–10 cm × 3–6 mm, bases not clasping, decurrent 4–8 mm, margins flat or slightly revolute, faces concolor, tomentose-sericeous (bases of hairs enlarged), sessile-glandular beneath tomentum. Heads in corymbiform arrays. Involucres campanulate, 5–6 mm. Phyllaries in 5–6 (–7) series, white (opaque, dull), ovate or elliptic (keeled, apiculate), glabrous. Pistillate florets (80–) 115 [–180]. Bisexual florets (6–) 8–12 [–30]. Cypselae weakly ridged, papillate-roughened or smooth.


Phenology: Flowering Jul–Oct.
Habitat: Grasslands, chaparral, openings in oak-pine-juniper, oak, and ponderosa pine woodlands, roadsides, disturbed sites
Elevation: 1500–2300 m

Distribution

V19-699-distribution-map.gif

Ariz., Colo., Nebr., N.Mex., Tex., Mexico

Discussion

Pseudognaphalium jaliscense is recognized by its relatively long, narrow, concolor to weakly bicolor leaves with non-clasping, short-decurrent bases, relatively large heads with white, opaque, dull phyllaries, and relatively large numbers of pistillate and bisexual florets. Counts of pistillate and bisexual florets from the United States collections are mostly 90–115 and (6–)8–12 (fewer than in Mexico).

Selected References

None.

Lower Taxa

None.
white +  and gray +
tomentose +  and velutinous +
grayish;greenish +
arachnose +, glabrescent +  and glabrous +
scarious +
mostly ovate +  and lanceovate or linear +
indeterminate +  and determinate +
Guy L. Nesom +
(Greenman) Anderberg +
decurrent +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Gnaphalium jaliscense +
compound +  and simple +
mostly narrowly lanceolate;oblanceolate +
5-ribbed +, 3-ribbed +  and 2-ribbed +
muriculate +, papillate +  and smooth +
Jalisco rabbit-tobacco +
actinomorphic +
smooth +  and papillate-roughened +
Ariz. +, Colo. +, Nebr. +, N.Mex. +, Tex. +  and Mexico +
1500–2300 m +
tomentose-sericeous +
papillate-roughened +
winged +  and beaked +
dispersed +
Grasslands, chaparral, openings in oak-pine-juniper, oak, and ponderosa pine woodlands, roadsides, disturbed sites +
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 />) +
campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 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 /> (0.6 cm6 mm <br />0.006 m <br />) +
cauline +  and basal +
rarely lanceovate +  and lanceolate +
revolute +  and flat +
2-carpellate +
persistent +
Flowering Jul–Oct. +
bearing subulate enations +, hairy +  and bristly +
conic;more or less columnar +
4 +  and 6 +
exalbuminous +
Illustrated +
decumbent +  and procumbent +
appendaged +  and truncate +
papillate +
Compositae +
Pseudognaphalium jaliscense +
Pseudognaphalium +
species +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
biennial +  and annual +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +
shrub +  and subshrub +