Waldsteinia
Waldsteinia parviflora
barren-strawberry, waldsteinie
small-petal barren strawberry
1–20+, ± erect.
deciduous, basal, sometimes clustered around scape, simple or compound;
stipules adnate to petiole base, narrow, scarious, margins entire;
petiole present;
blade ± rounded, deeply cordate, ternate or 3–5(–7)-lobed, 3–5 cm, herbaceous, margins flat, when lobes usually shallow, dentate, often with large teeth distally, venation palmate, surfaces strigose or hirsute.
mostly ternately compound, rarely merely deeply lobed;
leaflets broadly cuneate-obovate, 3–5 cm, lateral ones asymmetric, margins commonly shallowly and irregularly lobed, surfaces sparsely hirsute.
terminal, 3–8-flowered, panicles, open, ± as long as petioles, elongating somewhat in fruit;
bracts present;
bracteoles absent.
3–7-flowered.
present.
8–20 mm diam.;
epicalyx bractlets 0 [5, minute];
hypanthium broadly obconic to obcampanulate, slightly contracted at mouth, 2–4 mm, strigose or glabrous;
sepals 5, spreading, triangular;
petals 5, yellow, obovate to elliptic, elliptic-lanceolate, or suborbiculate;
stamens 50–70, ± equal to petals, filaments persistent;
torus not evident, receptacle base villous;
carpels 3–7, short-villous;
ovule 1.
8–10 mm diam.;
hypanthium obcampanulate, 2–4 mm, strigose;
petals elliptic to elliptic-lanceolate, 2.5–4.5 mm, shorter than to barely exceeding sepals, apex often acute;
carpels 3 or 4.
aggregated achenes, 3–7, broadly crescent-shaped, 1.5–2.5 mm, short-villous;
hypanthium persistent;
sepals persistent, ± reflexed;
styles deciduous, not hooked.
= 7.
Waldsteinia
Waldsteinia parviflora
Species 6 or 7 (4 in the flora).
Plants of Waldsteinia are distinctive, small, rhizomatous, and often mat-forming herbs of woodlands with ternate or three- to five-lobed leaves, differing from Geum by their long, straight, deciduous styles. J. E. E. Smedmark (2006) showed that the type species of Waldsteinia is nested in Geum.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Waldsteinia parviflora closely resembles W. fragarioides but has generally smaller flowers with petals shorter than to subequal to the sepals. The possibility that W. parviflora originated as a hybrid between W. fragarioides and W. lobata should be investigated.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaves mostly ternately compound, rarely merely deeply lobed | → 2 |
1. Leaves 3–5(–7)-lobed, shallowly so or to ± 2/3 cleft | → 3 |
2. Petals obovate to broadly elliptic, 3.5–10 mm, much longer than sepals. | W. fragarioides |
2. Petals elliptic to elliptic-lanceolate, 2.5–4.5 mm, shorter than to barely exceeding sepals. | W. parviflora |
3. Flowers 8–10 mm diam.; petals narrowly elliptic, barely exceeding sepals, bright yellow. | W. lobata |
3. Flowers 15–18 mm diam.; petals broadly elliptic to suborbiculate, much longer than sepals, creamy yellow. | W. idahoensis |
WildflowerSearch
iNaturalist
USDA Plants Database
