Milla (genus of plants)

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Milla
Milla biflora

Milla biflora

Systematics
Class : Bedecktsamer (Magnoliopsida)
Monocots
Order : Asparagales (Asparagales)
Family : Asparagaceae (Asparagaceae)
Subfamily : Brodiaeoideae
Genre : Milla
Scientific name
Milla
Cav.

The Milla are a genus of plants in the subfamily Brodiaeoideae within the family Asparagaceae within the order of the asparagus (Asparagales).

description

Illustration from Flore des serres , Volume 14 by Milla biflora
Illustration from Edwards' botanical register, or, Ornamental flower-garden and shrubbery ... by Milla biflora

Vegetative characteristics

Milla species are perennial herbaceous plants . These geophytes form membranous tubers as persistence organs; In contrast to the leek family (Alliaceae) , they do not form bulbs .

Two to seven basal leaves are formed. The simple, sessile leaves are linear and keeled. The leaf margin is smooth.

Generative characteristics

Usually only one is formed per tuber, rarely two erect and durable inflorescence shafts are formed, which are stem-round and especially rough in the upper area. The seemingly umbellate inflorescences are similar to those of the leek family (Alliaceae). The four membranous and initially green bracts are narrow-triangular and do not enclose the flowers even when they are budded. The flowers are sessile or there are 4 to 15 centimeters long peduncles.

The hermaphrodite flowers are radial symmetry and threefold. The six equal multiform bloom are salverform fused at its base to a long narrow tube. The free area of ​​the bracts is shorter than the flower tube. The colors of the free areas of the bracts are white with green, pink or blue stripes below. There are two circles with three identical stamens in each flower. The stamens are inserted in the tube of the bracts and are free from each other. The three pistils have become a top permanent, dreikammerigen ovary grown with only two ovules per ovary chamber. The ovary has a long stalk. This fruit knot stalk is fused with the flower tube with three edges. The long style ends in a short three-lobed stigma and towers above the flower tube.

The capsule fruits , billed by the long-lasting stylus, open in folds = loculicide and contain six seeds. The black, flattened seeds have a somewhat cell-sized, reticulated seed coat .

Systematics and distribution

The genus Milla belongs to the subfamily brodiaeoideae in the family asparagaceae (Asparagaceae). It used to belong to the tribe Brodiaeeae in the subfamily of Allioideae within the family of Alliaceae . The genera of this tribe were all placed in the Themidaceae family and now in the Brodiaeoideae subfamily. It used to be part of the lily family (Liliaceae).

The genus Milla was established in 1793 by Antonio José Cavanilles in Icones et Descriptiones Plantarum , 2, page 76, plate 196. Type species is Milla biflora Cav. Synonyms for Milla Cav. are: Askolame Raf. , Gyrenia Knowles & Westc. ex Loudon , Diphalangium S.Schauer .

The Milla species are distributed from southern North America to Central America , but only one species has this wide distribution. Of the eleven or so species, ten occur only in Mexico, mostly in only one state at a time.

The genus Milla comprises about eleven species since 2014 :

  • Milla biflora Cav. (Syn .: Askolame biflora .. (Cav) Raf , Blandfordia uniflora Willd. Ex Kunth , Diphalangium graminifolium S.Schauer , Gyrenia biflora (Cav) Knowles & Westc ex Loudon.. ): It is from the southeastern US states of Arizona and southwestern New Mexico spread over Mexico and Guatemala to Honduras .
  • Milla bryanii I.M.Johnst. : It only occurs in the Mexican state of Coahuila .
  • Milla delicata H.E. Moore : It occurs only in the Mexican state of Guerrero .
  • Milla filifolia T.M. Howard : It was first described in 1999. It occurs only in the Mexican state of Morelos .
  • Milla magnifica H.E. Moore : It occurs only in the Mexican states of Guerrero and Morelos.
  • Milla mexicana T.M. Howard : It was first described in 1999. It occurs only in the Mexican states of Puebla and Oaxaca.
  • Milla mortoniana H.E. Moore : It only occurs in the Mexican state of Guerrero.
  • Milla oaxacana Ravenna : It occurs only in the Mexican state of Oaxaca .
  • Milla potosina T.M. Howard : It was first described in 1999. It occurs only in the Mexican state of San Luis Potosí .
  • Milla rosea H.E. Moore : It only occurs in the Mexican state of Nuevo León .
  • Milla valliflora J.E. Gut. & E. Solano : It was first described in 2014. It occurs only in the Mexican states of Puebla and Oaxaca.

use

Few species are rarely used as ornamental plants.

swell

Individual evidence

  1. ↑ a b c d e Dale W. McNeal Jr .: 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 . Milla. , Pp. 346-347 - online with the same text as the printed work .
  2. ^ A b c Milla in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved December 24, 2019.
  3. ↑ a b Milla at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved December 24, 2019.
  4. ↑ a b c d e f g h i j k l m Rafaël Govaerts (Ed.): Milla. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved December 24, 2019.
  5. ↑ Milla in pacificbulbsociety .

Web links

Commons : Milla  - collection of images, videos and audio files
  • Vascular Plants of the Americas : Milla at Tropicos.org. In: 83 . Missouri Botanical Garden, St. Louis
  • Milla at Tropicos.org. In: Flora Mesoamericana . Missouri Botanical Garden, St. Louis