Brodiaea insignis

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Brodiaea insignis
Systematics
Monocots
Order : Asparagales (Asparagales)
Family : Asparagaceae (Asparagaceae)
Subfamily : Brodiaeoideae
Genre : Brodiaea
Type : Brodiaea insignis
Scientific name
Brodiaea insignis
( Yeps . ) TFNiehaus

Brodiaea insignis 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 insignis 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 May to June. The slender inflorescence stem is 7 to 24 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 2 to 9 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 pink to pinkish-purple bloom bracts are fused to form a narrow, cylindrical, opaque flower tube with a length of 6 to 9 millimeters, which does not narrow above the ovary 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 broadly spread out with a length of 11 to 15 millimeters. In Brodiaea insignis there are three sterile stamens, i.e. staminodes , which are located within the bracts and are fused with them , which resemble small petals and each face the outer bracts. In the case of the white staminodes located near the stamens and with a width of 6 to 8 millimeters relatively wide, the edges are 3/4 rolled up and the upper end is bilobed. The three fertile stamens are located opposite the inner bracts and are also fused at the base of the envelope. The base of the stamens, which are linear with a length of 1 to 2 millimeters, is broadened and forms triangular wings, there are no appendages or they are only narrow and inconspicuous. 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 2 to 4 millimeters and the upper end has a hook. Three carpels are long to a 4 to 5 millimeters, three crests membered ovary grown. The 4 to 5 millimeter long stylus ends in a three-lobed scar .

The egg-shaped capsule fruits open in folds = loculicide. The seeds are black.

The basic chromosome number is x = 16, there is diploidy with a chromosome number of 2n = 32.

Occurrence and endangerment

From Brodiaea insignis several locality are known in California Tulare County are in three areas along the river basins Kaweah and Tule. It thrives in the foothills of the Sierra Nevada in woodland in open locations at altitudes of 200 to 500 meters.

The populations of Brodiaea insignis are endangered. The threat comes from grazing and anthropogenic development.

Taxonomy

The first description of the basionym was made 1922 (1921) as a variety Brodiaea synandra var. Insignis Jeps. by Willis Linn Jepson in A Flora of California , Volume 1, 6, page 288. The rank of a species Brodiaea insignis (Jeps.) TFNiehaus was given in 1971 by Theodore F. Niehaus in University of California Publications in Botany , Volume 60, page 52 receive.

Individual evidence

  1. ↑ a b Rafaël Govaerts (Ed.): Brodiaea insignis. 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 k J. Chris Pires: In: Flora of North America Editorial Committee (Hrsg.): 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 insignis (Jepson) TF Niehaus , p. 326 - online with the same text as the printed work .
  3. ↑ a b c d e f J. Chris Pires, Robert E. Preston: Brodiaea , 2012: Brodiaea insignis data sheet in Jepson Flora Project (ed.): Jepson eFlora .
  4. ↑ Willis Linn Jepson : A Flora of California , Volume 1, 6, 1922, p. 288. scanned at biodiversitylibrary.org .
  5. ↑ a b Brodiaea insignis at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed December 31, 2019.

Web links