Flora of North America species comparison

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Ivesia lycopodioides

club-moss ivesia, clubmoss mousetail
Habit Plants green, usually rosetted, sometimes ± tufted; taproot fusiform, fleshy.
Stems

decumbent to erect, 0.3–3 dm.
Basal leaves

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.
Cauline leaves

0–2(–3), not paired.
Inflorescences

3–20(–25)-flowered, (0.5–)1–2.5(–3.5) cm diam.;

glomerules usually 1.
Pedicels

(0.5–)1–7(–11) mm.
Flowers

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.
Achenes

greenish tan to light brown, 1.2–1.5 mm.

Ivesia lycopodioides
Distribution
from FNA
CA; NV
[WildflowerSearch map]
[BONAP county map]
Discussion

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.)
Key
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
Source FNA vol. 9, p. 232.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Ivesia
Sibling taxa
I. aperta, I. argyrocoma, I. arizonica, I. baileyi, I. callida, I. campestris, I. cryptocaulis, I. gordonii, I. jaegeri, I. kingii, I. longibracteata, I. muirii, I. multifoliolata, I. paniculata, I. patellifera, I. pickeringii, I. pityocharis, I. pygmaea, I. rhypara, I. sabulosa, I. santolinoides, I. saxosa, I. sericoleuca, I. setosa, I. shockleyi, I. tweedyi, I. unguiculata, I. utahensis, I. webberi
Subordinate taxa
I. lycopodioides var. lycopodioides, I. lycopodioides var. megalopetala, I. lycopodioides var. scandularis
Synonyms Potentilla lycopodioides
Name authority A. Gray: Proc. Amer. Acad. Arts 6: 530. (1865)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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