Erechtites minimus |
Erechtites glomeratus |
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Australian bornweed, coastal burnweed, tooth coast burnweed |
Australian burnweed, cutleaf burnweed |
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Habit | Annuals or perennials, (50–)100–200 cm (sparsely and unevenly tomentose, glabrescent). | Annuals or perennials, (20–)100–200 cm (gray- to white-villous or -tomentose, often unevenly glabrescent). |
Taproots | with branching lateral roots. |
with branching lateral roots. |
Stems | 1, erect. |
1, erect. |
Leaves | evenly distributed (proximal often withering before flowering); indistinctly petiolate (bases often weakly clasping); blades lanceolate to narrowly lanceolate, (3–)7–20 × 1–4 cm, margins sharply and evenly toothed (not lobed or pinnatifid). |
evenly distributed (proximal withering before flowering); petioles weakly defined, ± clasping; blades lanceolate to narrowly lanceolate or lance-linear, (2–)7–15 × 1–4 cm, margins pinnatifid to pinnately lobed (lobes often sharply dentate) or dentate (distal leaves bractlike). |
Involucres | cylindric or turbinate, 4–7 mm. |
cylindric or turbinate, 4–7 mm. |
Receptacles | 3–5 mm diam. |
2–5(–6) mm diam. |
Phyllaries | usually 8. |
usually 13. |
Heads | (40–)80–200 in open, corymbiform arrays (or arrays of clusters). |
(20–)40–120 in loose, corymbiform arrays (sometimes arrays of clusters). |
Cypselae | 1.5–2 mm, usually puberulent in lines along relatively narrow ribs, sometimes glabrous. |
1.2–1.5 mm, puberulent in lines or grooves between the relatively broad ribs. |
2n | = 60. |
= 60. |
Erechtites minimus |
Erechtites glomeratus |
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Phenology | Flowering summer–early fall. | Flowering summer–early fall. |
Habitat | Disturbed, coastal sites | Disturbed sites, mostly coastal |
Elevation | 0–200 m (0–700 ft) | 0–300 m (0–1000 ft) |
Distribution |
CA; OR; WA; Pacific Islands (New Zealand); Australia [Introduced in North America]
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CA; OR; WA; Pacific Islands (New Zealand); Australia [Introduced in North America] |
Discussion | The type of Erechtites prenanthoides (A. Richard) de Candolle (a name sometimes misapplied to plants of E. minimus) is conspecific with the type of E. quaridentata (Labillardière) de Candolle. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 20, p. 604. | FNA vol. 20, p. 604. |
Parent taxa | Asteraceae > tribe Senecioneae > Erechtites | Asteraceae > tribe Senecioneae > Erechtites |
Sibling taxa | ||
Synonyms | Senecio minimus | Senecio glomeratus, E. argutus, Senecio argutus |
Name authority | (Poiret) de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 6: 437. (1838) | (Desfontaines ex Poiret) de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 6: 297. (1838) |
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