Pseudognaphalium californicum

(de Candolle) Anderberg

Opera Bot. 104: 147. 1991.

Common names: California rabbit-tobacco
Basionym: Gnaphalium californicum de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 6: 224. 1838
Synonyms: Gnaphalium decurrens var. californicum (de Candolle) A. Gray
Treatment appears in FNA Volume 19. Treatment on page 423. Mentioned on page 416, 417, 424.

Annuals, biennials, or perennials, 20–40 cm; taprooted. Stems stipitate-glandular, sometimes lightly villous as well. Leaf-blades mostly narrowly oblong-lanceolate, 4–10 cm × 5–10 (–20) mm (relatively even-sized distally), bases auriculate-clasping to subclasping or not, decurrent (2–10 mm) or not, margins flat or slightly revolute, faces concolor, mostly green, stipitate-glandular, viscid, sometimes lightly villous as well. Heads in corymbiform arrays. Involucres campanulo-globose, 5.5–7 mm. Phyllaries in 7–10 series, white (opaque, shiny or dull), broadly ovate to oblong-obovate, glabrous. Pistillate florets 105–140. Bisexual florets 7–12. Cypselae ridged, smooth. 2n = 28.


Phenology: Flowering Apr–Jul.
Habitat: Sandy canyons, dry hills, coastal chaparral
Elevation: 60–800 m

Distribution

V19-696-distribution-map.gif

Calif., Oreg., Mexico (Baja California)

Discussion

Leaf insertion in Pseudognaphalium californicum is unusually variable: bases may be clasping to subclasping without decurrent margins or decurrent and not show any clasping tendency.

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 +
(de Candolle) Anderberg +
not +, auriculate-clasping +  and subclasping +
not +  and decurrent +
Gnaphalium californicum +
compound +  and simple +
mostly narrowly lanceolate;oblanceolate +
5-ribbed +, 3-ribbed +  and 2-ribbed +
muriculate +, papillate +  and smooth +
California rabbit-tobacco +
actinomorphic +
Calif. +, Oreg. +  and Mexico (Baja California) +
60–800 m +
green;concolor +
villous +  and stipitate-glandular +
papillate-roughened +
winged +  and beaked +
dispersed +
Sandy canyons, dry hills, coastal chaparral +
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-globose +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
cauline +  and basal +
rarely lanceovate +  and lanceolate +
revolute +  and flat +
2-carpellate +
persistent +
Flowering Apr–Jul. +
bearing subulate enations +, hairy +  and bristly +
conic;more or less columnar +
4 +  and 6 +
exalbuminous +
decumbent +  and procumbent +
appendaged +  and truncate +
papillate +
Gnaphalium decurrens var. californicum +
Pseudognaphalium californicum +
Pseudognaphalium +
species +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
perennial +, biennial +  and annual +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
shrub +  and subshrub +