Ivesia lycopodioides
Ivesia webberi
club-moss ivesia, clubmoss mousetail
Webber's ivesia, wire ivesia, wire mousetail
decumbent to erect, 0.3–3 dm.
decumbent to ascending, 0.5–1.5(–1.8) dm.
tightly to loosely cylindric, 1–15 cm; sheathing base glabrous abaxially;
petiole 0.5–4 cm, hairs 0.2–1 mm;
leaflets 10–35 per side, 1–8 mm, glabrous or short-hirsute, minutely glandular, lobes (2–)4–8(–10), linear to obovate or ± orbiculate, apex sometimes setose.
loosely ± cylindric, 3–7(–10) cm; sheathing base ± strigose abaxially;
petiole 0.5–5(–6) cm, hairs 2–4 mm;
leaflets 4–8(–10) per side, (0.5–)3–8(–10) mm, loosely long-strigose or -villous and short-hirsute, ± glandular, lobes 2–5(–12), linear to lanceolate, apex not setose.
0–2(–3), not paired.
2, paired.
3–20(–25)-flowered, (0.5–)1–2.5(–3.5) cm diam.;
glomerules usually 1.
5–15(–25)-flowered, 1.5–3(–6) cm diam.;
glomerules 1.
(0.5–)1–7(–11) mm.
(0.5–)1–8(–13) mm.
6–12 mm diam.;
epicalyx bractlets oblong to oval, 0.8–2.5(–3) mm;
hypanthium shallowly cupulate, 1–2 × 2.5–5 mm;
sepals (1.8–)2–4(–4.5) mm, obtuse to acute;
petals golden yellow, obovate, 2–5 mm;
stamens 5, filaments 0.8–2 mm, anthers yellow, 0.6–0.8 mm;
carpels (5–)8–15(–18), styles 1–3 mm.
9–12 mm diam.;
epicalyx bractlets linear, 1.2–3 mm;
hypanthium cupulate, 1–2(–2.5) × 2.5–5 mm;
sepals 2.5–4.5(–5.5) mm, acute;
petals yellow, narrowly oblanceolate, 2–3(–4) mm;
stamens 5, filaments 1.8–2.5(–3) mm, anthers yellow, (0.8–)1–1.6 mm;
carpels 3–8, styles 1.8–2.2 mm.
greenish tan to light brown, 1.2–1.5 mm.
light brown, often mottled darker brown, 1.9–2.5 mm.
Ivesia lycopodioides
Ivesia webberi
Varieties 3 (3 in the flora).
The three varieties of Ivesia lycopodioides are for the most part readily distinguished, though intergradation is known. The high-elevation var. lycopodioides extends farthest north; var. scandularis is the only variety in the White Mountains. Variety megalopetala is found mostly at somewhat lower (subalpine) elevations and generally has a more southern range.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Ivesia webberi is known only from the eastern foothills of the northern Sierra Nevada and scattered ranges to the east in California and adjacent Nevada. It is among the more distinctive species in the genus and is only tentatively placed in sect. Ivesia. The leaflets are loosely incised into slender, sparsely villous segments, and the two cauline leaves are paired with dissected stipules. Previous reports of the stems and inflorescence branches being glandular-puberulent are due to a misinterpretation of the minute pustulose bases associated with the villous indumentum as being enlarged glands.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaflets short-hirsute, apical setae (0–)0.5–1(–2) mm; White Mountains and c Sierra Nevada. | var. scandularis |
1. Leaflets glabrous or sparsely short-hirsute, apical setae 0–0.5 mm; Sierra Nevada and Sweetwater Mountains | → 2 |
2. Leaflet lobes ± orbiculate, ± 1 mm; petals 2–3 × 1 mm. | var. lycopodioides |
2. Leaflet lobes linear to oblanceolate, 2–8 mm; petals 3–5 × 2–4 mm. | var. megalopetala |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
