Isocoma pluriflora

(Torrey & A. Gray) Greene

Erythea2: 111. 1894

Common names: Southern jimmyweed
Synonyms: Haplopappus heterophyllus Haplopappus pluriflorus Isocoma wrightii
Basionyms: Linosyris pluriflora
Found in FNA Volume 20. Treatment on page 445. Mentioned on page 440.
FNA20 P47 Isocoma acradenia.jpeg
Herbage usually glabrous or sparsely hispidulous, sometimes densely hirtellous, leaves sometimes stipitate-glandular, never resinous. Leaf blades oblanceolate to narrowly oblong-oblanceolate or nearly linear, mostly 10–40(–50) mm, margins usually entire (hispidulous-cilate, sometimes also on faces), sometimes shallowly toothed distally (especially along western margin of range; teeth in 1(–3) pairs). Involucres 3.2–5.5 × 2.5–4 mm. Phyllary apices yellowish, or if green, then margins scarious, not aristate, gland-dotted, without resin pockets. Florets (8–)11–17(–21); corollas 5–6 mm. Cypsela ribs not forming hornlike extensions. 2n = 12, 24.

Phenology: Flowering (Apr–)Jul–Oct.
Habitat: Igneous or calcareous substrates, sometimes over gypsum, sandy or clay loam, commonly with Larrea-Prosopis
Elevation: 400–1400(–1600) m

Distribution

Ariz., N.Mex., Tex., Mexico (Chihuahua, Coahuila).

Discussion

Like other species of Isocoma, I. pluriflora usually is gland-dotted, but scattered plants are stipitate-glandular.

References

None.

Facts about "Isocoma pluriflora"
AuthorGuy L. Nesom +
BasionymLinosyris pluriflora +
Common nameSouthern jimmyweed +
Elevation400–1400(–1600) m +
HabitatIgneous or calcareous substrates, sometimes over gypsum, sandy or clay loam, commonly with Larrea-Prosopis +
IllustratorBarbara Alongi +
PhenologyFlowering (Apr–)Jul–Oct. +
ReferenceNone +
SynonymHaplopappus heterophyllus +, Haplopappus pluriflorus + and Isocoma wrightii +
Taxon nameIsocoma pluriflora +
Taxon parentIsocoma +
Taxon rankspecies +
VolumeVolume 20 +