dcsimg
Life » » Plants » » Dicotyledons » » Composite Family »

Junak's Desertdandelion

Malacothrix junakii W. S. Davis

Comments

provided by eFloras
Malacothrix junakii is known only from middle Anacapa Island.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 311, 317 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Description

provided by eFloras
Annuals, 5–30 cm. Stems 1–4, ascending to erect, ± branched proximally and distally (leafy to apices), glabrous. Cauline leaves: proximal oblanceolate, pinnately lobed (lobes 2–4 pairs, obtuse), ultimate margins entire or dentate; distal not much reduced (± linear, lobes usually 1–2 near bases, apices acute). Calyculi of 7–11, ovate to lanceolate bractlets, hyaline margins 0.05–0.2 mm. Involucres 7–8.5 × 3–6 mm. Phyllaries 9–13+ in 2–3 series, (red-tinged) oblong to lanceolate or lance-linear, hyaline margins 0.1–0.2 mm wide, faces glabrous. Receptacles not bristly. Florets 20–85: corollas medium yellow, 7–11 mm; outer ligules exserted 3.5–5.5 mm. Cypselae ± prismatic, 1.6–2 mm, ribs extending to apices, ± equal or 5 more prominent than others; persistent pappi of 11–14, irregular, ± dentate teeth plus 1–2 bristles. Pollen 70–100% 4-porate. 2n = 28.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 311, 317 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Malacothrix junakii

provided by wikipedia EN

Malacothrix junakii is a rare species of flowering plant in the family Asteraceae known by the common names Anacapa Island desert-dandelion, Junak's desertdandelion, and Junak's malacothrix. It is endemic to Anacapa Island, one of the Channel Islands of California, where it is known from just two occurrences.[1] It occurs in the coastal scrub of the island. It was described to science as a new species in 1997.[2]

This is an annual herb with a branching, leafy stem up to 30 centimeters tall. The leaves are lance-shaped with toothed or lobed blades, the upper leaves with fewer, narrower lobes. The inflorescence contains several flower heads in one or more open clusters. The head is lined with hairless red-tinged green phyllaries. It contains yellow ray florets each roughly a centimeter long.

This rare species faces threats from introduced plant species on the island.[1]

References

  1. ^ a b California Native Plant Society Rare Plant Profile
  2. ^ Davis, W. S. (1997). The systematics of annual species of Malacothrix (Asteraceae: Lactuceae) endemic to the California Islands. Madroño 44 223–244.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN

Malacothrix junakii: Brief Summary

provided by wikipedia EN

Malacothrix junakii is a rare species of flowering plant in the family Asteraceae known by the common names Anacapa Island desert-dandelion, Junak's desertdandelion, and Junak's malacothrix. It is endemic to Anacapa Island, one of the Channel Islands of California, where it is known from just two occurrences. It occurs in the coastal scrub of the island. It was described to science as a new species in 1997.

This is an annual herb with a branching, leafy stem up to 30 centimeters tall. The leaves are lance-shaped with toothed or lobed blades, the upper leaves with fewer, narrower lobes. The inflorescence contains several flower heads in one or more open clusters. The head is lined with hairless red-tinged green phyllaries. It contains yellow ray florets each roughly a centimeter long.

This rare species faces threats from introduced plant species on the island.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN