Acis is a genus of perennial, herbaceous

Herbaceous

A herbaceous plant is a plant that has leaves and stems that die down at the end of the growing season to the soil level. They have no persistent woody stem above ground...

 and bulbous plants in the Amaryllis family (Amaryllidaceae

Amaryllidaceae

Amaryllidoideae is the subfamily of flowering plants that takes its name from the genus Amaryllis. It is part of the family Amaryllidaceae, in order Asparagales...

, subfamily Amaryllidoideae). The genus consists in 9 species distributed in Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

 and Northern Africa

Africa

Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

.

The genus was reinstated in 2004, after it was determined on morphological and molecular grounds that these species should be segregated from Leucojum.

Species

The list of Acis species, with their complete name and authority, is given below.

Acis autumnalis (L.) Herb. 1837 (syn.: Leucojum autumnale). Acis autumnalis var. autumnalis Acis autumnalis var. oporantha (Jord. et Fourr.) Lledó, A.P.Davis & M.B.Crespo 2004. Acis autumnalis var. pulchella (Jord. et Fourr.) Lledó, A.P.Davis & M.B.Crespo 2004. Acis fabrei (Quézel & Girerd) Lledó, A.P.Davis & M.B.Crespo 2004. Acis ionica Bareka, Kamari & Phitos 2006 . Acis longifolia J.Gay ex M.Roemer 1847. Acis nicaeensis (Ardoino) Lledó, A.P.Davis & M.B.Crespo 2004. Acis rosea (F.Martin) Sweet1829. Acis tingitana (Baker) Lledó, A.P.Davis & M.B.Crespo 2004. Acis trichophylla Sweet Acis trichophylla var. trichophylla Acis trichophylla var. broteroi (Jord. & Fourr.) Lledó, A.P.Davis & M.B.Crespo 2004. Acis trichophylla var. micrantha (Gattef. & Maire) Lledó, A.P.Davis & M.B.Crespo 2004. Acis valentina (Pau) Lledó, A.P.Davis & M.B.Crespo 2004.

Image:Acis autumnalis005.jpg| Acis autumnalis
Image:Acis fabrei.jpg | Acis fabrei
Image:Acis ionica.jpg | Acis ionica
Image:Leucojum-longifolium1.JPG| Acis longifolia
Image:Acis_nicaeensis.jpg| Acis nicaeensis
Image:Leucojum trichophyllum 1.JPG| Acis trichophylla
Image:Acis valentina flower.jpg | Acis valentina