Barkleyanthus salicifolius (Kunth) H.Rob. & Brettell

국표에 없다.

 

General Information

Stems abundantly branched, arching distally. Leaves tapering to weakly defined petioles; blades 3–10(–15) × 0.5–1.5 cm. Heads (3–)8–16 in each array, arrays usually clustered. Phyllaries 4–6(–8) mm, tips green, obtuse. Ray corollas 8–12+ mm. Disc corollas (5–)7–8+ mm. Cypselae (1.5–)2–3 mm; pappi 5–6+ mm. 2n = 60.

• Provided by: [B].Flora of North America @ efloras.org

Synonyms

•    Cacalia angustifolia var. angustifolia     Cineraria angustifolia Kunth     Cineraria dracunculoides Moc. & Sessé ex DC.    Cineraria salicifolia Kunth     Cineraria verna Mair. ex DC.    Senecio axillaris Klatt     Senecio humboldtianus var. humboldtianus     Senecio salignus DC.     Senecio vernus DC.    Senecio xarilla Sessé & Moc. 

Barkleyanthus salicifolius (Kunth) H.Rob. & Brettell (worldfloraonline.org)

ECOLOGY
Nectar rich flowers services a multitude of nectar seeking organisms, mostly insects. Granivorous birds may eat the seeds. This is one of a few species of plants that produces a pyrrolizidine alkaloid (PA for short). PA’s occur in many plants and are well known to ranchers, being poisonous to livestock (and humans) as they serve to protect the plants from grazing. However, it turns out that the PA isn’t poisonous to butterflies, and is essential to the reproduction of queens and monarchs. When you see them nectaring on plants that contain PAs, over 90% of them are males happily imbibing the alkaloid with the nectar. They convert the PA into a chemical that they use as a sex attractant pheromone that draws in the females. During mating, the male passes the remaining unchanged PA to the female as a “nuptial gift” that once again manifests itself as a toxin, this time rendering her eggs unpalatable to predators! Thus as the butterfly pollinates the flower, the flower provides a molecule that in two ways enables the butterfly to reproduce!

Asteraceae: Barleyanthus salicifolius — Spadefoot Nursery

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