Flora of North America species comparison

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Anulocaulis annulatus

ringstem, valley ringstem
Habit Herbs, stout perennial.
Stems

0.5–2 m. Leaves: 4–6 pairs proximal to inflorescence;

petiole 1–7 cm;

blade broadly ovate to almost reniform, 2–10 × 2–9.5 cm, base broadly rounded to truncate or cordate, apex rounded to broadly obtuse, adaxial surface yellow-green, abaxial surface much paler, both surfaces moderately villous-hirsute, hairs with dark brown to blackish pustulate bases.
Flowers

5–15 in umbel-like clusters on branches of inflorescence;

perianth 9–10 mm, tube very pale pink to rose-pink, densely shaggy-hairy, limbs very pale pink to rose-pink, gradually flared;

stamens 3, exserted 1–2 mm.
Fruits

broadly fusiform, 3.5–6 × 2.1–2.7 mm, not secreting mucilage when wetted;

ribs 10, well defined, linear, low, narrow;

equatorial ridge absent or occasionally low, linear, and incomplete.
2n

= 24.

Anulocaulis annulatus
Phenology Flowering late winter–late summer, occasionally mid fall.
Habitat Dry, gravelly outwash fans, talus slopes, roadsides
Elevation 70-1200 m (200-3900 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 4, p. 29.
Parent taxa Nyctaginaceae > Anulocaulis
Sibling taxa
A. eriosolenus, A. leiosolenus, A. reflexus
Synonyms Boerhavia annulata
Name authority (Coville) Standley: Contr. U.S. Natl. Herb. 12: 375. (1909)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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