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wing-stem camphorweed

Habit Perennials, 50–200 cm; fibrous-rooted. Herbs, subshrubs, shrubs, or trees.
Stems

minutely hirtellous to strigillose and sessile-glandular (winged by decurrent leaf bases).

Leaves

sessile;

blades usually lanceolate to lance-elliptic (proximal sometimes spatulate or oblanceolate), mostly 5–15 × 1–3(–4) cm, margins shallowly and closely toothed, faces minutely hirtellous to strigillose and sessile-glandular.

usually cauline, sometimes mostly basal; alternate; petiolate or sessile;

margins entire or denticulate to serrate or dentate [1–2-pinnately divided].

Involucres

hemispheric to cupulate, 4–7 × 8–10 mm.

Receptacles

flat to convex, epaleate [paleate].

Ray florets

0 (whitish corollas of peripheral pistillate florets sometimes with minute, 3-toothed laminae in Sachsia) [in 1(–2+) series, pistillate and fertile or neuter].

Peripheral (pistillate) florets

[0] (in disciform heads) in 1–10+ series;

corollas (usually present) usually pink to purplish, sometimes whitish or ochroleucous, rarely yellowish.

Corollas

white or rose-purple.

Phyllaries

greenish to cream, ± stipitate-glandular (outer oval-oblong to linear-attenuate).

persistent or falling, (12–30+) in 3–6+ series, distinct, unequal, usually ± herbaceous to chartaceous, sometimes indurate, margins and/or apices seldom notably scarious.

Calyculi

0.

Heads

in corymbiform arrays.

heterogamous (usually disciform, rarely obscurely radiate), usually in corymbiform, paniculiform, or spiciform arrays, sometimes borne singly (on scapiform stems in Sachsia).

Cypselae

mostly monomorphic within heads, usually columnar, cylindric, ellipsoid, or fusiform, sometimes ± prismatic, sometimes compressed or flattened, not beaked, bodies smooth or ribbed (glabrous or ± hirsutulous, hairs straight-tipped, uncinate, or glochidiform, faces sometimes glandular as well);

pappi [sometimes 0] persistent or tardily falling, usually of smooth to barbellate [plumose] bristles or setiform scales (in 1–2 series).

Pappi

persistent, bristles distinct.

Disc

(inner) florets bisexual or functionally staminate;

corollas usually pink to purplish, sometimes whitish or ochroleucous, rarely yellowish, not 2-lipped, lobes (4–)5, deltate;

anther bases ± tailed, apical appendages ovate to lance-ovate or linear;

styles abaxially papillate or hairy (sweeping hairs usually obtuse, usually present from proximal to the separation of the branches to near the tips), branches linear, adaxially stigmatic in 2 lines from bases to apices (lines ± confluent distally), apices obtuse to rounded, appendages essentially none.

2n

= 20.

Pluchea sagittalis

Asteraceae tribe plucheeae

Phenology Flowering Jul–Aug.
Habitat Moist or wet, open habitats, ballast deposit areas
Elevation 0–10 m (0–0 ft)
Distribution
from FNA
AL; FL; South America; West Indies [Introduced in North America]
[BONAP county map]
South America; Mostly tropical and subtropical areas of Central America; Africa; Asia; and Australia [Some species are widely introduced and established in local floras]
Discussion

Pluchea sagittalis is adventive, probably a waif; it was collected as a ballast weed by C. Mohr near Mobile (1891, 1894, 1896) and by A. H. Curtiss near Pensacola (1886, 1901).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Genera ca. 27, species ca. 219 (3 genera, 12 species in the flora).

Plucheeae were segregated from traditionally circumscribed Inuleae by Anderberg in 1989 (see discussion in A. A. Anderberg 1994b).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Stems winged; heads in spiciform arrays
Pterocaulon
1. Stems seldom winged (see Pluchea sagittalis); heads usually in corymbiform or paniculiform arrays, rarely borne singly
→ 2
2. Leaves all or mostly basal
Sachsia
2. Leaves all or mostly cauline
Pluchea
Source FNA vol. 19, p. 480. FNA vol. 19, p. 475.
Parent taxa Asteraceae > tribe Plucheeae > Pluchea Asteraceae
Sibling taxa
P. baccharis, P. camphorata, P. carolinensis, P. foetida, P. longifolia, P. odorata, P. sericea, P. yucatanensis
Subordinate taxa
Pluchea, Pterocaulon, Sachsia
Synonyms Conyza sagittalis, P. quitoc, P. suaveolens tribe Plucheinae
Name authority (Lamarck) Cabrera: Bol. Soc. Argent. Bot. 3: 36. (1949) (Cassini ex Dumortier) Anderberg: Canad. J. Bot. 67: 2293. (1989)
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