Flora of North America species comparison

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Dimorphocarpa pinnatifida

tansy spectaclepod
Habit Annuals.
Stems

branched basally and distally, 2–9 dm.
Basal leaves

petiole 0.5–2 cm;

blade linear to linear-lanceolate, (2–)3–6(–8) cm × (2–)3–5(–8) mm, base attenuate, margins pinnatifid.
Cauline leaves

(distal) shortly petiolate or subsessile;

blade linear to narrowly lanceolate, base cuneate, margins pinnately lobed.
Flowers

sepals 2–3 × 1–1.5 mm, pubescent abaxially;

petals white, (3.5–)4–6.5 × 2–3.5 mm, attenuate to claw, claw 1–1.5 mm, expanded basally;

filaments white, 2–3 mm;

anthers 0.8–1.1 mm.
Fruiting pedicels

divaricate to slightly reflexed, (8–)10–17(–22) mm, (straight).
Fruits

each valve orbicular, 5–6.5 × 6–7 mm (nearly as long as wide), base and apex rounded, not margined beyond indurated part surrounding seeds, pubescent;

style 0.5–1 mm.
Seeds

suborbicular, 2.5–3.5 × 2–3 mm.
2n

= 18.

Dimorphocarpa pinnatifida
Phenology Flowering Mar–Apr.
Habitat Sandy hills and flats
Elevation 100-800 m (300-2600 ft)
Distribution
from FNA
AZ; Mexico (Sonora)
[BONAP county map]
Discussion

Dimorphocarpa pinnatifida is known from Pima and Yuma counties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 605.
Parent taxa Brassicaceae > tribe Physarieae > Dimorphocarpa
Sibling taxa
D. candicans, D. wislizeni
Name authority Rollins: Publ. Bussey Inst. Harvard Univ. 1979: 28. (1979)
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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