Rhododendron polytrichum
Billeder af Rhododendron polytrichum
Beskrivelse
R. polytrichum Tilhører bedst (Fortunea). Nyintroduceret art af Jens Nielsen. Planten har 5 kronlober og 10-14 støvdragere. Hårfordeling som R. chihsinianum (Auriculata) og Fortunea: Griflen er besat med lange kirtelhår, der bliver korter mod støvfanget. Ovariet besat med lange kirtelhår. Støvdragere glatte. Men der er kun 5 kronlober. Ligner mere R. glanduligferum, R. magniflorum mm i hårfordelingen (Fortunea), her har arterne 5-7 kronlober, men også frøets udseende. Er ikke placeret i en subsektion af Flora of China da bestemmelsesnøglerne giver et uklart svar. DNA analyser kan sikkert løse problemet.
Hans Eiberg
Sleumer har sat arten under Maculifera https://wfoplantlist.org/taxon/wfo-1000002600-2022-12?page=1
13-628. c.w. polytrichum, JN# 12380, 1150 m., southwest Hunan, Chengbu County
New to cultivation recently described very bristly species in Maculifera, seems to link to Fortunea.
Remarkable long rachis and shound be very ornamental. From type location where it is endargered by farming.
Please try to home surplus seedlings as there may not be a second chance from here, but R. polytrichum is
also know from one collection from Guangxi. Jens Nielsen
● R. polytrichum ARS13 #628 frø. Foto: Hans Eiberg
● R. polytrichum ARS13 #628 frø. Foto: Hans Eiberg
Flora og China
RBGE Herbarium; R. polytrichum (no data)
Flora of China
Shrubs, usually ca. 2 m tall; bark gray, smooth; older branches glabrous; branchlets stout; young shoots densely brown glandular-setose. Petiole 15–30 mm, with scattered glandular setae; leaf blade leathery, narrowly elliptic to oblong-elliptic, 12–15(–20) × 4–5(–7) cm; base cuneate or subrounded; apex acute or acuminate; adaxial surface dark green; midrib grooved, prominent; lateral veins 16–18-paired. Inflorescence 7–9-flowered; rachis 40–50 mm, setose. Pedicel 2.5–4 cm, brown glandular-setose; calyx cupular, outer surface setose; corolla tubular-funnelform, rose, 3.5–4 cm, lobes 5, obovate, ca. 1.5 cm, emarginate; stamens 10, unequal, 2.5–3.5 cm, filaments glabrous; ovary ovoid, densely glandular and tomentose; style setose at base, stigma capitate. Capsule ovoid ca. 15 × 8 mm, persistently hairy. Fl. Apr, fr. Jul. Forests; ca. 1100 m. NE Guangxi, SW Hunan. Forests; ca. 1100 m. NE Guangxi, SW Hunan.