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prairie pinweed

large-pod pinweed, round-fruit pinweed

Habit Herbs, perennial. Herbs, perennial.
Stems

basal produced; flowering erect, 25–45 cm, densely sericeous.

basal produced; flowering erect to decumbent or arcuate-ascending, (3–)5–60 cm, sericeous.

Leaves

of flowering stems alternate or subopposite;

blade narrowly oblanceolate, 13–20 × 1.5–3 mm, apex acute, often mucronate, abaxial surface pilose, adaxial glabrous.

of flowering stems alternate or subopposite;

blade elliptic-lanceolate or lanceolate to oblanceolate, 10–25 × 1.5–5 mm, apex acute, abaxial surface hairy on midvein and margins, adaxial glabrous.

Pedicels

1 per axil, 1.6–2 mm.

1 per axil, 1.5–3 mm.

Flowers

calyx 1.6–1.8 mm, outer sepals shorter than inner.

calyx 1.9–2.3 mm, outer sepals shorter than inner.

Capsules

subglobose to broadly ovoid, (1.8–)2–2.5 × 2–2.5 mm, ± equaling calyx.

broadly ovoid, depressed-globose, or subglobose, 1.8–2 × 1.7–2.1 mm, shorter to ± equaling calyx.

Seeds

3–4.

4–6, membranous coat gray.

Lechea stricta

Lechea intermedia

Phenology Flowering summer–fall; fruiting fall.
Habitat Sandy, open fields, grasslands, lakeshores, woodland margins
Elevation 100–800 m (300–2600 ft)
Distribution
from FNA
IA; IL; MI; MN; ND; NE; WI; ON
[WildflowerSearch map]
[BONAP county map]
from FNA
CT; IA; IL; MA; ME; MN; MT; ND; NH; NJ; NY; OH; PA; RI; SD; VA; WI; WY; AB; MB; NB; NS; ON; PE; QC; SK
[WildflowerSearch map]
[BONAP county map]
Discussion

Some individuals of Lechea stricta can be difficult to determine with certainty; the extremes of variation of L. stricta often grade into that of L. intermedia and L. pulchella.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Varieties 4 (4 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Capsules depressed-globose, ± equaling calyx; inner sepals broadly ovate, apex obtuse.
var. intermedia
1. Capsules subglobose to broadly ovoid, shorter than calyx; inner sepals elliptic-ovate, apex subacute
→ 2
2. Flowering stems decumbent to arcuate-ascending, 3–12 cm.
var. depauperata
2. Flowering stems erect, 25–60 cm
→ 3
3. Leaves of basal stems mostly 4-ranked; blades elliptic-lanceolate.
var. juniperina
3. Leaves of basal stems mostly 2-ranked; blades lanceolate to oblanceolate.
var. laurentiana
Source FNA vol. 6, p. 396. FNA vol. 6, p. 391.
Parent taxa Cistaceae > Lechea Cistaceae > Lechea
Sibling taxa
L. cernua, L. deckertii, L. divaricata, L. intermedia, L. lakelae, L. maritima, L. mensalis, L. minor, L. mucronata, L. pulchella, L. racemulosa, L. san-sabeana, L. sessiliflora, L. tenuifolia, L. torreyi
L. cernua, L. deckertii, L. divaricata, L. lakelae, L. maritima, L. mensalis, L. minor, L. mucronata, L. pulchella, L. racemulosa, L. san-sabeana, L. sessiliflora, L. stricta, L. tenuifolia, L. torreyi
Subordinate taxa
L. intermedia var. depauperata, L. intermedia var. intermedia, L. intermedia var. juniperina, L. intermedia var. laurentiana
Name authority Leggett ex Britton: Bull. Torrey Bot. Club 21: 251. (1894) Leggett ex Britton: Bull. Torrey Bot. Club 21: 252. (1894)
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