Genus Alyssum L.
Род 352 (26). ИГЛОВРЪХ — ALYSSUM L.¹
L., Sp. Pl. ed. 1 (1753) 650; Gen. Pl. ed. 5(1754) 722.
Fam: Cruciferae Juss. (Brassicaceae)
Genus: Alyssum L.
English Name: an exact common name was not foundDescription: Herbaceous, annual or perennial plants, with entire leaves covered with unbranched and starlike hairs. Stems simple or branched. Flowers clustered in racemose, similar to a broom or thyroid inflorescences. Sepals erect or semi-erect, at the base without swellings in the form of sacs. Petals yellow, entire or short incised. The two lateral nectar glands are triangular or oblong, the middle glands are missing. The petioles of the shorter stamens at the base usually widened, winged or wingless or with a tooth. The style is short, the stigma is spherical. Fruits cracked, round, elliptical or oval, with flat or slightly convex caps and with 1 to 8 seeds per nest. Seeds flat. The embryo with several roots.
Econcomic importance. Honey plants. Perennial tufted representatives are used as ornamental plants for artificial rock groups.
Table for determination of the species
1 Petals no longer than 3.5, rarely 4 mm ........................................................…..…………………… 2
1* Petals longer than 4.5 mm ..................................................................................................………… 8
2 The pods covered with hairs ............................................................................……......................... 3
2* The pods are bare or almost bare ....................................……….................................……………. 7
3 The sepals are preserved when the pods are ripe. Shorter stamens at the base with two filamentous nectar glands .....................................................................................…………. 1. - A. alyssoides (L.) L.
3* The sepals of the fruit fall off. Shorter stamens at base with more or less broad teeth ...................... 4
4 Inflorescences compact, similar to awnings. The pods ovoid, bulging at the sides ............................ ........................................................................................................................... 8. - A umbellatum Desv.
4* Inflorescences elongated. The pods on the edge side flattened .......................................................... 5
5 Annual plants ............................................................................................... 7. - A. minus (L.) Rothm.
5* Perennial tufted plants with sterile shoots or rosettes at their base .................................................... 6
6 Plants with erect, 20 - 60 (120) cm tall stems and thyroid inflorescence. Stem leaves 10 - 20 mm long and 3 - 6 mm wide, often in grooves with sterile leafy branches. The pods are flattened. Winged Edge Seeds …...……………................................................................... 11. - A. murale Waldst. et Kit.
6* Plants with ascending, 3 - 20 cm tall stems and with clustered (sometimes branched) inflorescences. Stem leaves smaller. Fruits with convex lids and often S-curved. Seeds without winged rim ................ ......................................................................................................................... 12. - A. tortuosum Willd.
7 The sepals are preserved in the fruit. The style at the base with star-like hairs ...................... ........................................................................................................................ 10. - A. minutum Schlecht.
7* The sepals of the fruit fall off. The style at the base without hairs ............... 9. - A. desertoram Stapf
8 (1*) The pods are bare. Basal leaves large, usually serrated .................................... 13.- A saxatile L.
8* The pods are covered with hairs. Basic leaves entire ....................................................................... 9
9 The wings of the long stamens gradually thin out to the apex and do not form teeth ............................ ……….................................................................................................................... 5. - A, pulvinare Vel.
9* The wings of the long stamens at the upper end cut off or forming teeth .......................................... 10
10 Tufts lying in high altitude plants, usually with creeping shoots ...................... 6. A cuneifolium Ten.
10* Stems erect or ascending, with sterile but not creeping shoots ...................................................... 11
11 Star-similar hairs on blossom petioles with uneven rays; the longer rays protrude perpendicularly to the petiole and look like simple spread hairs ........................................................ 4. - A. repens Baumg.
11* Star- similar hairs on blossom petioles without protruding rays, but often mixed with wet hairs .............................................................................................................................................................. 12
12 The sepals are saved as the pods mature. Blossom petioles with mixed, star-shaped and spread wet hairs ......................................................................................................................... 3. - A stribrnyi Vel.
12* The sepals ususally are fall off . Llossom petioles without spresding hair ............. A. montanum L.
Developed by [N. Stoyanov ]
From: „Флора на НР България”, том IV, БАН, София, (1970) * * *
Alyssum is a genus of about 100–170 species of flowering plants in the family Brassicaceae, native to Europe, Asia, and northern Africa, with the highest species diversity in the Mediterranean region. The genus comprises annual and perennial herbaceous plants or (rarely) small shrubs, growing to 10–100 cm tall, with oblong-oval leaves. Alyssum flowers are characteristically small and grouped in terminal clusters[1]; they are often yellow or white colored but can be pink or purple.
The genera Lobularia and Aurinia are closely related to Alyssum and were formerly included in it. The widely cultivated species popularly known as "sweet alyssum" is Lobularia maritima. The common rockery plant is Aurinia saxatilis.
Alyssum foliage is used as food by the caterpillars of certain Lepidoptera, including the Gem (Orthonama obstipata). However, rabbits will not eat it.[2]
From Wikipedia, the free encyclopedia* * *
Alyssum
The genus Alyssum is in the family Brassicaceae in the major group Angiosperms (Flowering plants).
Statistics are at the end of the page.
From: www.theplantlist.org › browse › Brassicaceae › Alyssum * * *
Distribution in Bulgaria: (Conspectus of the Bulgarian Vascular Flora) = conspectus&gs_l= Zlc. Distribution: References: „Флора на НР България”, том IV, БАН, София, (1970), Wikipedia, the free encyclopedia, www.theplantlist.org › browse › Brassicaceae › Alyssum
SPECIES:
Alyssum murale Waldst. et Kit. - yellowtuft
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