Difference between revisions of "Pectis humifusa"
Prodr., 114. 1788.
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| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=I | ||
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| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_542.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae | ||
Revision as of 21:00, 27 May 2020
Annuals or perennials, 2–25 cm (across; bases often ± woody); herbage not scented. Stems prostrate (mat-forming, densely leafy), puberulent (in decurrent lines). Leaves oblong-oblanceolate to obovate, 3–17 × 1.5–4 mm wide, margins with 2–6 pairs of setae 1–2 mm, faces glabrous (dotted with scattered, round oil-glands 0.1–0.2 mm). Heads borne singly or in congested, (leafy) cymiform arrays. Peduncles 1–12 mm. Involucres campanulate. Phyllaries distinct, obovate, 4.5–6 × 2–4 mm (faces densely dotted with scattered, circular oil-glands 0.05–0.2 mm). Ray florets 5; corollas 3.5–5 mm. Disc florets 12–21; corollas 2.5–3.5 mm (2-lipped). Cypselae 2.5–4 mm, mostly puberulent (ray cypselae abaxially glabrous); ray pappi of 2–3 slender, aristate scales 1.5–2.5 mm plus 2–10 lacerate scales or bristles; disc pappi of 4–15, antrorsely scabrid bristles or aristate scales 2–3 mm plus 0–15 bristles or scales. 2n = 72.
Phenology: Flowering year round.
Habitat: Sandy soils
Elevation: 0–10 m
Distribution
Fla., West Indies (Puerto Rico, Lesser Antilles), South America (Suriname).
Discussion
Pectis humifusa has been reported once from Florida (D. J. Keil 1975c), where it is probably adventive. In the Lesser Antilles, it occurs most frequently in the salt spray zone near the seashore; on some islands, it occurs inland as well.
Selected References
None.