Aphanes occidentalis

(Nuttall) Rydberg in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 22: 380. 1908.

Illustrated
Basionym: Alchemilla occidentalis Nuttall in J. Torrey and A. Gray, Fl. N. Amer. 1: 432. 1840
Treatment appears in FNA Volume 9. Treatment on page 311. Mentioned on page 310.

Plants slender, sparsely to densely hairy, hairs less than 1 mm. Stems erect or ascending, simple or branched from base, 1–10 (–15) cm. Leaves 3–9 mm; stipules overlapping only distally, 2–3 (–4) mm, lobes on distal nodes ovate, length 2/3–1 times undivided portion; petiole free from stipules in proximal leaves, adnate in distal ones; blade 2–5 mm, divided ca. 1/3 length, each segment 4–6-lobed, ovate, length 1.8–3 times width. Inflorescences opposing leaves, open, flowers tending to become exposed. Pedicels to 2 mm. Flowers 0.5–2 × 0.7–1.1 mm, 1–1.5 mm in fruit; epicalyx bractlets 0–0.5 mm; hypanthium ovoid to globose, contracted or not at apex, faintly ribbed; sepals connivent to spreading, 0.2–0.6 mm, ciliate. Fruits 0.8–1 mm.


Phenology: Flowering Mar–Jun.
Habitat: Vernally moist grasslands, chaparral, woodlands, clearings, rocky outcrops, cliffs, sandy beaches, waste ground, roadsides
Elevation: 0–1200 m

Distribution

V9 507-distribution-map.jpg

B.C., Calif., Oreg., Wash., Mexico (Baja California)

Discussion

Three races of Aphanes occidentalis are recognizable, apparently corresponding to previously described species. Some apparently intermediate plants exist, and not all specimens can be confidently assigned to these races, which are, therefore, not recognized as formal taxa here. The names under which they have been recognized and their distinguishing features and distributions are as follows:

Aphanes cuneifolia (Nuttall) Rydberg: hypanthium and calyx ovoid, 1 mm, smooth, often subglabrous; hypanthium contracted at apex, not densely hairy; epicalyx bractlets often present; sepals erect-connivent, 0.3–0.4 mm, 1/4–1/3 flower length. California; Mexico (Baja California).

Aphanes macrosepala Rydberg: hypanthium not contracted at apex, usually densely hairy, hairs spreading; epicalyx bractlets present; sepals spreading-erect, 0.5 mm, ca. 1/3 flower length. California, Oregon, Washington.

Aphanes occidentalis in the narrow sense: hypanthium and calyx ellipsoid, 1.5 mm, ± ribbed, sparsely short-hairy; hypanthium contracted at apex, not densely hairy; epicalyx bractlets usually absent; sepals usually connivent, 0.3–0.4 mm, 1/4–1/3 flower length. British Columbia; California, Oregon, Washington.

Selected References

None.

Lower Taxa

None.

"/3" is not declared as a valid unit of measurement for this property."/3-1timesundividedportion" is not declared as a valid unit of measurement for this property.

... more about "Aphanes occidentalis"
John McNeill +  and Barbara Ertter +
(Nuttall) Rydberg in N. L. Britton et al. +
compound +  and simple +
opposite +  and alternate +
Alchemilla occidentalis +
divided +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
free +  and distinct +
B.C. +, Calif. +, Oreg. +, Wash. +  and Mexico (Baja California) +
not +  and aggregated +
0–1200 m +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
1mm +  and 1.5mm +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Vernally moist grasslands, chaparral, woodlands, clearings, rocky outcrops, cliffs, sandy beaches, waste ground, roadsides +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
not +  and contracted +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
crassinucellate +
opposite +  and alternate +
not persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
pinnate +  and entire +
inferior +  and superior +
clustered +, biseriate +  and superposed +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
5 +  and 4 +
adnate +  and free +
Flowering Mar–Jun. +
adnate +, free +, connate +  and distinct +
in N. L. Britton et al., N. Amer. Fl. +
not arillate +
persistent +
free +  and distinct +
ovate +  and narrowly triangular +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Illustrated +
free +  and distinct +
branched +  and simple +
ascending +  and erect +
1 +  and 10 +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
palmate +  and pinnate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
adnate +  and free +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
deciduous +
distinct +
not elongate +
Aphanes occidentalis +
species +
inconspicuous +
flat +  and conic or turbinate +
reduced +
prostrate +  and ascending +