Pentzia calva
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Image 1
Habit
17 Dec 2018
Image 2
Leaves
17 Dec 2018
Image 3
Flower
17 Dec 2018
| Family: | Asteraceae |
| Full name: | Pentzia calva S.Moore |
| ID status: | Fairly certain |
| Afrikaans common name(s): | - |
| English common name(s): | - |
| Synonym(s): | Pentzia microcephala Dinter ex Range |
| Status: | Native |
| Description: | Compact, rounded, sparsely leafy, aromatic shrublet, 0.15–0.6 m tall; stems spreading to usually erect, wellbranched, branches divaricate, younger branches white- or grey-felted; cortex rough. Leaves alternate, regularly arranged along upper parts of branches, suberect to spreading, 2.5–24.0×±1.5–6.0 mm, pinnately 3- to 7(9)-lobed, lower half to one-third usually narrowed into petiole-like base 0.5–9.0 mm long; densely white- or grey-felted on both surfaces when young, sometimes glabrescent and often canescent, lobes ovate to narrowly oblong, 0.5–3.0 (-5.0)×±0.5– 1.0 mm, lateral lobes spreading semi-obliquely to obliquely or sometimes horizontally; sheath not differentiated from lamina, only uppermost leaves with 1 to 3 pairs of secondary basal lobes, remnants of leaf±persistent. Capitula discoid, homogamous, solitary or often with 1 or 2 additional capitula from leaf axils below; peduncle 2–28 mm long, sparsely to densely felted, greenish to light brown. Involucre hemispherical to broadly campanulate, 2.0–5.0×3.5–8.0 mm, erect to spreading at rim; involucral bracts 4- or 5-seriate, median resin canal absent, margins and apices broadly scarious, membranous apices of inner bracts 0.7–2.0 mm long; outer bracts lanceolate to ovate, 1.5–2.5 mm long; middle bracts ovate to broadly ovate, 2.0–3.0 mm long; inner bracts ovate to broadly elliptic, (2.0) 3.0–5.0 mm long, very slightly incurved apically; innermost bracts oblanceolate to obovate, 2.0–3.5 mm long. Receptacle convex, epaleate, alveolate. Florets bisexual, numerous. Corolla 1.5–3.0 mm long, yellow, with glandular trichomes; tube 1.0–1.5 (2.0) mm long; limb capuliform to campanulate, ±0.5–1.0 mm long (excluding lobes), 5-lobed; lobes triangular, spreading, ±0.5 mm long. Anthers ±0.6–1.2 mm long including apical appendages, slightly sagittate at base; apical appendages ovate to broadly ovate, obtuse. Style terete with thickened base; branches ±0.5 mm long, truncate, papillate apically–dorsally. Pappus absent (cypselar wall tissue rarely produced as rudimentary teeth at apices of some cypselae). Cypselas oblong, ±1.5×0.5 mm, 5-ribbed, glandular trichomes between ribs, mucilaginous when soaked. (from A taxonomic revision of Pentzia (Asteraceae, Anthemideae) (Magee, 2012)) |
| Link(s) |
African Plant Database
JSTOR Plant Science Kew Herbarium Catalogue BGBM Berlin-Dahlem - Virtual Herbarium Züricher Herbarien iNaturalist (Namibia / Alex Dreyer) iNaturalist (Namibia) iNaturalist (southern Africa) Flora of Zimbabwe Fleurs de notre Terre - Galerie Namibie Tree Atlas of Namibia |
| Content last updated: | 18 Apr 2024 |
