Piriqueta cistoides subsp. caroliniana

(Walter) Arbo
Ann. Missouri Bot. Gard. 77: 351. 1990.
Common names: Pitted stripeseed
Illustrated
Basionym: Waltheria caroliniana Walter Fl. Carol. 175. 1788
Synonyms: Piriqueta caroliniana (Walter) Urban P. caroliniana var. tomentosa Urban P. caroliniana var. viridis (Small) G. S. Torrey P. glabra P. viridis
Treatment appears in FNA Volume 6. Treatment on page 166.

Plants 10–60 cm. Leaves: petiole to 2(–8) mm; blade linear to elliptic or obovate, 8–70 × 1.5–22 mm, base cuneate to rounded, apex obtuse or acute, surfaces tomentose or glabrous. Peduncles and pedicels erect-ascending, combined length 6.5–22 mm. Flowers not self compatible; calyx 4.7–11 mm, tube 1.3–3 mm; petals 8–24 × 3–15 mm; stamens 3–5 mm in long-styled flowers, 5–9 mm in short-styled flowers; styles often forked, 3.5–6 mm in long-styled flowers, 1.3–3 mm in short-styled flowers. Capsules ovoid, 4–8 mm. Seeds 12–30, dark, 1.5–2.1 × 0.9–1.2 mm; aril unilateral, 1–2 mm. 2n = 14.


Phenology: Flowering and fruiting year-round.
Habitat: Marshes to dry pinelands and sand scrub, dry or scrubby flatwoods, sandhills, roadsides, other ruderal areas, sandy soil
Elevation: 0–60 m

Distribution

V6 303-distribution-map.jpg

Ala., Fla., Ga., S.C., West Indies, South America.

Discussion

Some authors consider subsp. caroliniana to be a species complex composed of multiple morphotypes that hybridize along a wide zone in Florida; North American populations would have been derived from three independent migrations from the northern Bahamas (M. B. Cruzan 2005; S. D. Maskas and Cruzan 2000; K. McBreen and Cruzan 2004; Jiongqion Wang and Cruzan 1998). The morphotypes differ mainly in leaf shape and indument; leaf traits and plasticity responses toward narrower shape and higher trichome density are associated with increased drought conditions (J. J. Picotte et al. 2009).

Selected References

None.

Lower Taxa

None.

María Mercedes Arbo +
(Walter) Arbo +
Waltheria caroliniana +
Pitted stripeseed +
Ala. +, Fla. +, Ga. +, S.C. +, West Indies +  and South America. +
0–60 m +
Marshes to dry pinelands and sand scrub, dry or scrubby flatwoods, sandhills, roadsides, other ruderal areas, sandy soil +
Flowering and fruiting year-round. +
Ann. Missouri Bot. Gard. +
Illustrated +
Piriqueta caroliniana +, P. caroliniana var. tomentosa +, P. caroliniana var. viridis +, P. glabra +  and P. viridis +
Piriqueta cistoides subsp. caroliniana +
Piriqueta cistoides +
subspecies +