Rhododendron scopulum
Billeder af Rhododendron scopulum
Beskrivelse
R. scopulum (Taliense / Neriiflora). Tidligere Rhododendron dachengense var. scopulum. Beskrevet i 2001 af Li. Nyfunden art som ligner R. haematodes. Er en dværgart fra det subtropiske Guangxi fundet ved 3500 ft. Genfundet af Kelly Dodson og S Hootman 2012. Er beskrevet i Rhododendron species 2016 RSF vol. 11, p21-26, Billeder side 90. Vokser på Dayao Shan. Dværgplante med tykt brunt indument. Acta Bot. Yunnan. 23(3): 287-288, f. 1, 1-7 287 2001. R. dachengense var. dachengense er senere fundet af Jens Nielsen i nærheden på klippevægge.
var. dachengense Corolla med røde pletter på øverste lapper. Lober 5-7, støvdragere 10-13, støvdragere hårede nedenfor.
R. scopulum Corolla uden pletter på øverste lapper, lapper 5, støvdragere 10, støvdragere glatte.
The older images from me of dachengense in the wild should be changed to scopulum. Chinese botanists split out dachengense var. scopulum (the “alpine”, dwarf and prostrate form, even though it is found only at around 3500 ft. in the subtropics) as just the species R. scopulum and made the much larger, tree-like form the species dachengense. As far as we have seen so far, the foliage of both is very similar and they both come from the same area at a similar altitude so a bit perplexing as the only difference is one is a tree and one is a prostrate groundcover! I get more confused every time I go over there.
Steve Hootman. (I agree HE)
Flora of China
R. dachengense G. Z. Li, Acta Bot. Yunnan. 23: 287. 2001. da cheng du juan.
Shrubs, 2–3 m tall; branchlets blackish gray; young branches densely velutinous, glabrescent; bud scales persistent. Petiole 5–17 mm, felted at first, soon glabrescent; leaf blade leathery, elliptic-oblong to obovate, (3–)3.5–7(–10) × (1.2–)1.5–2.5(–3) cm; base cuneate to rounded; apex acute or mucronate; abaxial surface with indumentum 2-layered, densely felted, upper layer of indumentum detersile, lower layer stuck together; adaxial surface green, glabrous; midrib impressed adaxially. Inflorescence racemose-umbellate, 4–7-flowered. Pedicel 0.5–1 cm, densely velutinous; calyx lobes 5–7, ca. 1 mm, undulate-triangular, velutinous; corolla campanulate, white to pink, upper lobes sometimes with red spots, 2.5–3 cm, lobes 5–7, suborbicular, 1–1.2 cm; stamens 10–13, 0.4–1.8 cm, filaments glabrous or pilose in lowest third; ovary conical, densely velutinous; style ca. 2.3 cm, glabrous, stigma capitate. Capsule not known. Fl. Apr. 800–1700 m. EC Guangxi.
The original author placed this species in Rhododendron subsect. Taliensia, but suggested that its affinities were with R. haematodes in R. subsect. Neriiflora. From the original description and accompanying plate, R. dachengense appears allied to, and is possibly conspecific with, R. roxieoides.
var. dachengense Corolla with red spots on upper lobes; lobes 5–7; stamens 10–13, filaments pilose below. Opret stor.var. scopulum Corolla without spots on upper lobes; lobes 5; stamens 10, filaments glabrous. Dværgplante.