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Lomatium packardiae

Packard's desert parsley, Succor Creek desert parsley

Habit Herbs green or ± blue-green, acaulous, (15–)20–40 cm, finely spreading-hirtellous; caudex multicipital, with persistent, dark brown or blackish leaf bases, without persistent peduncles; taproot thick.
Leaves

arising at slightly different heights, not forming just 1 rosette, green with slight bluish tone, openly ternate-, sometimes quinate-, 1–2-pinnate or -pinnatifid-pinnatifid;

petiole sheathing basally to entire length;

blade triangular or rhombic, 5–8 × 5.1–20.7 cm, surfaces finely hirtellous; ultimate segments (30–)50–120, linear or narrowly elliptic, crowded, confluent at base with adjacent lobe, 4–30 × 0.5–2 mm, most longer than 6 mm, relatively narrow, margins entire, usually not reflexed, apex acute, callus tips 0–0.2 mm, terminal segment 13–24(–27) mm;

cauline leaves 0.

Pseudoscapes

subterranean.

Peduncles

1–6 per plant, 1 per stem, curved-ascending or nearly erect, not inflated, 9–25 cm, exceeding leaves at least in fruit, 0.9–2 mm wide 1 cm below umbel, hirtellous.

Umbels

2.3–10.2 cm wide in flower, 4.6–8.5 cm wide in fruit, rays 9–26, ascending to spreading, longer ones 4–6 cm in fruit, unequal, hirtellous;

involucel bractlets (0–)3–9(–17), slightly connate basally, linear-attenuate, 2.5–5 mm, subequal to flowers, margins narrowly scarious, not ciliate, entire, glabrous.

Flowers

petals yellow, glabrous;

anthers yellow;

ovary and young fruit glabrous or sparsely spreading-hirtellous.

Fruiting pedicels

3–7 mm, shorter than fruit, spreading to erect when fruit is mature.

Mericarps

dorsiventrally compressed, broadly linear to elliptic, 8–9.7 × 3.1–4.5 mm, length/width ratio 1.7–2.1;

wings 0.8–1.8 mm wide, 45–55% of body width, paler than body;

abaxial ribs slightly or prominently raised;

apex rounded or truncate;

oil ducts 1 in intervals, 4–6 on commissure.

Lomatium packardiae

Distribution
from USDA
[WildflowerSearch map]
[BONAP county map]
Discussion

Flowering Apr–Jun; fruiting early Jun–Jul. Dry, open, sagebrush steppe, volcanic ash, rhyolite, and rocky clay soils; of conservation concern; 700–1100 m; Idaho, Oreg.

Lomatium packardiae is one of the splinters of the L. triternatum complex. It has been treated as a rare species endemic to high clay content soils around Succor Creek, southeastern Oregon (M. V. Ottenlips 2019), as an uncommon but fairly widespread taxon of eastern Oregon and southwestern Idaho, or as a component of L. anomalum that should not be given taxonomic recognition. Current research is inconclusive but supports treating it as a part of L. anomalum (Ottenlips et al. 2021).

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

Source FNA vol. 13.
Parent taxa Apiaceae > Lomatium
Sibling taxa
L. ambiguum, L. andrusianum, L. anomalum, L. attenuatum, L. austiniae, L. bentonitum, L. bicolor, L. bradshawii, L. brandegeei, L. brevifolium, L. brunsfeldianum, L. californicum, L. canbyi, L. caruifolium, L. ciliolatum, L. columbianum, L. congdonii, L. cookii, L. cous, L. cusickii, L. cuspidatum, L. dasycarpum, L. depauperatum, L. dissectum, L. donnellii, L. eastwoodiae, L. engelmannii, L. erythrocarpum, L. farinosum, L. filicinum, L. foeniculaceum, L. fusiformis, L. geyeri, L. gormanii, L. graveolens, L. grayi, L. greenmanii, L. hallii, L. hendersonii, L. hooveri, L. howellii, L. idahoense, L. insulare, L. junceum, L. juniperinum, L. klickitatense, L. knokei, L. kogholiini, L. laevigatum, L. latilobum, L. leptocarpum, L. linearifolium, L. lithosolamans, L. lucidum, L. macrocarpum, L. marginatum, L. martindalei, L. minimum, L. minus, L. mohavense, L. multifidum, L. nevadense, L. nudicaule, L. nuttallii, L. observatorium, L. ochocense, L. oreganum, L. orientale, L. papilioniferum, L. parryi, L. parvifolium, L. pastorale, L. peckianum, L. piperi, L. planosum, L. quintuplex, L. ravenii, L. repostum, L. rigidum, L. rollinsii, L. roneorum, L. salmoniflorum, L. sandbergii, L. scabrum, L. serpentinum, L. shevockii, L. simplex, L. stebbinsii, L. suksdorfii, L. swingerae, L. tamanitchii, L. tarantuloides, L. tenuissimum, L. thompsonii, L. torreyi, L. tracyi, L. triternatum, L. tuberosum, L. utriculatum, L. vaginatum, L. watsonii
Name authority Cronquist: Great Basin Naturalist 52: 75, fig. 1. (1992)
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