Difference between revisions of "Halenia"
Arch. Bot. (Leipzig) 1(1): 25. 1796.
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Latest revision as of 13:16, 24 November 2024
Herbs annual [perennial], chlorophyllous, glabrous. Leaves basal and cauline, opposite [whorled], sessile, basal and proximal cauline sometimes ± petiolate. Inflorescences cymes (often umbelloid) or thyrses. Flowers 4-merous; calyx lobed nearly to base; corolla yellow or pale green to violet [white], campanulate or ± ovoid and scarcely opening, glabrous, lobes longer than tube, margins entire or nearly so, with 4 spurs, 1 diverging from tube below each lobe [merely protuberance], plicae between lobes absent; stamens inserted in corolla sinuses; anthers distinct; ovary sessile; style persistent, erect, short or indistinct; stigmas 2; nectaries at ends of spurs, 1 in each spur. Capsules compressed-ovoid. x = 11.
Distribution
North America, Mexico, Central America, South America, Asia, temperate to alpine areas.
Discussion
Species ca. 40 (2 in the flora).
Halenia brevicornis (Kunth) G. Don, a widespread neotropical species, occurs in northwestern Chihuahua, Mexico, and should be sought in pine woods and along arroyos in southeastern Arizona and southwestern New Mexico.
Selected References
None.
Lower Taxa
Key
| 1 | Corollas pale green to violet; spurs proximally divergent at ca. 45°, 3–5 mm (occasionally absent on small plants). | Halenia deflexa |
| 1 | Corollas yellow; spurs proximally nearly horizontal, (3–)5–8(–16) mm. | Halenia rothrockii |