Ancistrocarphus filagineus

A. Gray

Proc. Amer. Acad. Arts 7: 356. 1868.

Common names: Hooked groundstar woolly fishhooks
Illustrated
Synonyms: Stylocline filaginea (A. Gray) A. Gray
Treatment appears in FNA Volume 19. Treatment on page 466. Mentioned on page 385, 465.

Plants 2–10 (–14) cm. Stems usually 2–10, ascending to prostrate, sometimes 1, ± erect; branches mostly distal (sometimes absent). Leaves basal and cauline, sessile or obscurely petiolate, largest 8–16 (–28) × 2–3 (–4) mm, very unlike pistillate paleae; bases (of leaves or petioles) ± attenuate, 1-nerved, greenish, herbaceous, scarcely involucral. Heads in glomerules of 2–5 in ± cymiform arrays, 3.5–5 mm (excluding staminate paleae). Phyllaries usually 3–6, minute, ± equal, hyaline, unlike pistillate paleae, sometimes vestigial or apparently 0. Receptacles fungiform, 0.9–1.5 mm. Pistillate paleae: wings prominent, erect, ovate, ± plane. Staminate paleae 5, broadly lanceolate, 2.7–4.1 mm, surpassing pistillate; apices uncinate, terete, acuminate, cartilaginous, spinose. Staminate corollas actinomorphic, 1–1.5 mm, lobes (4–) 5 (–6), ± equal. Cypselae 1.4–2 × 0.6–0.9 mm, transverse bands 1, proximal, black.


Phenology: Flowering and fruiting mid Mar–late Jun.
Habitat: Open, dry or vernally moist slopes, flats, drainages, shallow rocky to deep sandy or clay soils (often over serpentine or basalt), sometimes disturbed sites (burns, road beds)
Elevation: 60–1900(–2100) m

Distribution

V19-777-distribution-map.gif

Calif., Idaho, Nev., Oreg., Mexico (Baja California)

Discussion

Ancistrocarphus filagineus occurs nearly throughout the Californian Floristic Province inland from the immediate coast; in the south, it stops at the western fringes of the Mojave and Sonoran deserts; farther north, it continues into the northern Great Basin and Columbia Plateau of Oregon, northern Nevada, and southwestern Idaho. The rigid whorl of inwardly-hooked staminate paleae holds tenaciously to clothing, skin, animal coats, even vehicle tires, providing an effective dispersal mechanism. It is surprising that it has not spread farther.

Plants of populations farther inland, on drier sites and/or in deeper sandy soils, tend to be more compact with leaves shorter, more rounded, and indument denser and whitish. Stylocline filaginea var. depressa has sometimes been misapplied to these unnamed forms. The two forms intermingle enough so as not to warrant formal taxonomic status.

Selected References

None.

Lower Taxa

None.
scarious +
mostly ovate +  and lanceovate or linear +
indeterminate +  and determinate +
James D. Morefield +
A. Gray +
involucral +
attenuate +
compound +  and simple +
oblanceolate;obovate +
muriculate +, papillate +  and smooth +
spatulate;lanceolate;less boatshaped;ovoid +
Hooked groundstar +  and woolly fishhooks +
actinomorphic +  and staminate +
red-tipped +, purplish +, yellow +  and whitish +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
black-banded +  and brown +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not gibbous +, obovoid +  and obcompressed +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Calif. +, Idaho +, Nev. +, Oreg. +  and Mexico (Baja California) +
60–1900(–2100) m +
staminate +  and pistillate +
winged +  and beaked +
dispersed +
Open, dry or vernally moist slopes, flats, drainages, shallow rocky to deep sandy or clay soils (often over serpentine or basalt), sometimes disturbed sites (burns, road beds) +
singly +  and aggregated +
indeterminate +
homogamous +  and heterogamous +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
each +  and sessile +
inconspicuous +
petiolate +  and sessile +
1.6 cm16 mm <br />0.016 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
8mm;16mm +
cauline +  and basal +
largest +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rarely lanceovate +  and lanceolate +
2-carpellate +
pistillate +  and staminate +
persistent +
spreading +, erect +  and ascending +
apparently +  and vestigial +
lanceolate;unlike;unlike +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.41 cm4.1 mm <br />0.0041 m <br />) +
persistent +
Flowering and fruiting mid Mar–late Jun. +
Proc. Amer. Acad. Arts +
paleate +  and epaleate +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
exalbuminous +
Illustrated +
erect +, ascending +  and prostrate +
1 +, 2 +  and 10 +
appendaged +  and truncate +
papillate +
Stylocline filaginea +
Ancistrocarphus filagineus +
Ancistrocarphus +
species +
0.5 cm5 mm <br />0.005 m <br /> (14 cm140 mm <br />0.14 m <br />) +
plane +  and ovate +