Brodiaea stellaris

from Wikipedia, the free encyclopedia
Brodiaea stellaris
Systematics
Monocots
Order : Asparagales (Asparagales)
Family : Asparagaceae (Asparagaceae)
Subfamily : Brodiaeoideae
Genre : Brodiaea
Type : Brodiaea stellaris
Scientific name
Brodiaea stellaris
Hoover

Brodiaea stellaris is a species of the genus Brodiaea in the asparagus family (Asparagaceae). This endemic occurs only in the western US state of California .

description

Vegetative characteristics

Brodiaea stellaris grows as a perennial herbaceous plant . Plant tubers are formed as persistence organs . One to six narrow leaves are produced per tuber during the growing season.

Generative characteristics

The flowering time in California is in spring from late May to early June. The slender inflorescence stem is only 2 to 6 inches long. At the end of the inflorescence stem there is an open, golden inflorescence . The bracts also cases, this is still in bud during the inflorescence, not completely. There are also cover sheets . The flower stalk is 1 to 5 inches long.

The hermaphrodite flowers are radial symmetry and threefold. There are two circles, each with three bracts , which are fused at their base. The three outer bracts are slightly narrower than the inner three. The six bluish-purple bracts are fused into a bell-shaped, translucent flower tube with a length of 7 to 10 millimeters and does not open until the fruit is ripe. The corolla is a total of 14 to 24 millimeters long and the free part of the bracts is usually more than twice as long as the flower tube. The free part of the bracts is spread out at a length of 7 to 15 millimeters and bent back at the upper end. In Brodiaea pallida there are three sterile stamens, ie staminodes , that are fused with the bracts and resemble small petals and each face the outer bracts. In the upright, white staminodes located near the stamens and with a width of 4 to 8 millimeters relatively wide, the edges are rolled up 1/4 upwards and the upper end is notched wide. The three fertile stamens are located opposite the inner bracts and are also fused at the base of the envelope. The base of the 1 to 3 millimeter long stamen is not triangular, the upper area is forked and has two striking white, wide appendages, of which the lower is designed as a wing behind the anthers. These appendages are clearly different from those of Brodiaea appendiculata and Brodiaea californica and are probably not homologous. The size and shape of the stamens and the structures at the base of the stamens are important determinants for the Brodiaea species. The anthers are linear with a length of 4 to 6 millimeters and the upper end is notched. Three carpels are long to a 6 to 9 mm, three crests membered ovary grown. The 4 to 5 millimeter long stylus ends in a three-lobed scar .

The egg-shaped, loculicidal capsule fruit does not open when ripe and is transparent. In all other Brodiaea species, the ripe capsule fruits open and are transparent, or do not open and are opaque. The seeds are black.

The number of chromosomes is 2n = 12.

Occurrence

Brodiaea stellaris occurs in northwestern California. It thrives near the coast in clearings of evergreen mixed forests and redwood forests on soils above serpentine rock at altitudes of 0 to 900 meters.

Taxonomy

The first description of Brodiaea stellaris in 1882 by Sereno Watson in Proceedings of the American Academy of Arts and Sciences , Volume 17, page 381. A synonym for Brodiaea stellaris S.Watson is Hookera stellaris (S.Watson) Greene .

Individual evidence

  1. ↑ a b Rafaël Govaerts (Ed.): Brodiaea stellaris. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Accessed December 31, 2019.
  2. ↑ a b c d e f g h i J. Chris Pires: In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico. Volume 26: Magnoliophyta: Liliidae: Liliales and Orchidales , Oxford University Press, New York and Oxford, 2002, ISBN 0-19-515208-5 . Brodiaea stellaris S. Watson , p. 327 - online with the same text as the printed work .
  3. ↑ a b c d e J. Chris Pires, Robert E. Preston: Brodiaea , 2012: Brodiaea stellaris data sheet in Jepson Flora Project (ed.): Jepson eFlora .
  4. ↑ Brodiaea stellaris at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed December 31, 2019.

Web links