털구름바위솔

털구름바위솔

Aichryson tortuosum (Aiton) Webb & Berthel.

과명	Crassulaceae (돌나물과)	속명	Aichryson (아이크리손속)
전체학명	Aichryson villosum (Aiton) Webb & Berthel.	추천명	털구름바위솔
이명		외국명

학명변경: 명명자변경 Webb & Berthel. -> (Aiton) Webb & Berthel. 추천명변경: 빌로숨바위솔 -> 털구름바위솔 

Aichryson tortuosum (Aiton) Webb & Berthel.
Hist. Nat. Iles Canaries (Phytogr.). 2(1): 184 1840.

Origin and Habitat: Aichryson tortuosum is indigenous to the Canary Islands (Lanzarote and Fuerteventura), Spain.

Altitude range: Up to 700 metres above sea level.

Habitat and ecology: This species is confined to the arid regions of Lanzarote and Fuerteventura, which are the two driest of the Canary Islands. It grows tucked into crevices on the vertical sides of permanently windswept volcanic cliffs and at many places along the island shaded, northern ridges.

Description: Often misspelled (tortulosum), Aichryson tortuosum is a small, very ornamental, perennial shrublet 10-15(-20) cm tall with dense tortuous branches, hence the specific name. It has crowded, fleshy and pubescent (downy) leaves in dense rosettes looking like a miniature Aeonium lindleyi. The small yellow flowers in a lax inflorescence typically have seven or eight petals. This neat little plant is the old and long-known Sempervivum tortuosum. It is quite variable and, as for most members of Aichryson, the true, unhybridized species is rarely seen in cultivation.
Stems: c. 5 mm thick, hairy, often glabrous below, Branches woody, tortuous, divaricate.
Leaves: Highly succulent, 10-12 long, 4-6 mm wide, 2-3 mm thick, blade broadest above the middle, obovate, rounded, sessile, densely glandular-hairy, viscid (scent resinous), dark green, tinged purplish-red or brown.
Inflorescence: From short laxly leafy shoots, few-flowered; Pedicels to 7 mm.
Flowers: 7- to 8-merous, 9 - 12 mm in diameter. Sepals glandular hairy (hairs up to 0.5 mm). Petals 5 - 6 mm, elliptic, acuminate, aristate, deep yellow, tips reflexed, margins often finely ciliate.
Seeds: Dust like.
Related species: Aichryson bethencourtianum Bolle is very similar to Aichryson tortuosum, so similar that an expert in this genus as Bañares Baudet (2008) considers it to be, a subspecies the latter (Aichryson tortuosum ssp. bethencourtianum (Bolle) Bañares & S. Scholz). They are distinguished from each other primarily by the excretion of a viscid substance from the dense hairs of A. tortuosum, which has sessile leaves, as opposed to A. tortuosum ssp. bethencourtianum, which has indistinctly petiolate leaves and longer, non-glandular hairs. They occur sympatrically on Fuerteventura, but only A. tortuosum has reported occurrences on Lanzarote.