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Rhododendron leigongshanense R. leishanicum Til L R. ledebourii

Rhododendron leigongshanense

 R. leigongshanense HPH. Photo: Theo Leijdens
R. leigongshanicum aff. HPH 09/15, med lange kirtelhår bladoverside, stor calyx. Lidt kirtelhår på undersiden. Fra Leigong Shan Foto: Theo Leijdens
Denne plante har dog for mange blomster i klasen end de 10-11. Bladranden med grenede hår.

 R. glanduliferum. Photo: Hans Eiberg
R. glanduliferum/leigongshanicum hos SHH, bladundersider blåhvide (uhåret 1.sept). Foto: Hans Eiberg

 R. glanduliferum. Photo: Hans Eiberg
R. glanduliferum/leigongshanense ? hos SHH, blomsterstilk (1-2 cm), (Calyx 0-1mm), ovariet(rillet) og griffel kraftig kirtelhåret. Foto: Hans Eiberg

 R. glanduliferum. Photo: Steve Hootman
R. glanduliferum/leigongshanicum hos RSBG rød nyvækst. Foto: Steve Hootman

R. leigongshanense (Fortunea) ligner R. glanduliferum, men har stilkede kirtelhår på bladundersiden på unge blade. Vokser i SØ Guizhou. Trompetformede blomster 7.5-8.0 cm long, 8-10 cm in diameter) der sidder 10-11 i blomsterstanden, Frøkapslerne meget rillede og stærkt behårede af langstilkede kirtelhår.
Denne art, R. glanduliferum, R. chihsinanum og R. magniflorum har mange fælletræk og er måske samme art.
R. magniflorum's blomst er størst på 9,5-10 cm lang, leigongshanense på 7,5-8 cm og glanduliferum på 5-6 cm. lang
R. magniflorum's calyx og blomst har 5 lober, medens de tre andre arter har ca. 7 lober
R. chihsinanum har ikke kirtelhåret blomsterstilk, der er 1 cm lang, kronen 4 cm med 7 lober

H. Eiberg


Evergreen small tree, 5 m tall, c. 16 cm in diameter; branchlets thick, cylindrical with stipitate
glands. Leaf blade leathery or thick-leathery, 6–9 leaves on branch-top, pendulous; young leaves
violet, densely stipitate glands and floccose; leaf blade oblong-elliptic, apex acute, base broadly
cuneate, slightly asymmetry, 15–21 × 5.0–7.5 cm, margin revolute, abaxial surface stipitate
glands; midrib, veins and lateral veins slightly grooved adaxially, midrib and lateral veins
prominent abaxially, lateral veins 15–18 pairs. Petiole 2–4 cm long, glandular. Inflorescence
racemose, 10 or 11-flowered, rachis light brown, 7.0–9.5 cm long, densely stipitate glands; bract
lanceolate, abaxial thinly stipitate or non-stipitate glands, adaxial densily glands and villous;
pedicels 3.5–4.5 cm long with densely long glands. Calyx 7-lobed, lobes semi-circle, disparate, 2–
4 mm long, abaxial glandular, adaxial smooth. Corolla trumpet-shaped, 7-lobed, white, 7.5–8.0 ×
8.0–10.0 cm, succulent, aromatic, rotund, abaxial stipitate or non-stipitate glands. Stamens 16,
unequal, 4–6 cm long, filaments bald. Ovary conoid, 5–8 mm long, densely glands; style thick, 5–
8 cm long, faint green, densely stipitate or non-stipitate glands to the tip; stigma pale, disk-like, 2–
3 mm in diameter. Capsule cylindric, 3.0–3.5 × 1.0–1.2 cm, slightly curved, densely stipitate or
non-stipitate glands.
 Phenology: Flowering from June to July; fruiting from October to November.
 Etymology: The specific epithet is named after the type locality Leigongshan.
Vernacular name: Leigongshan Dujuan.
 Distribution: So far, this species is only known from the type locality Leigongshan Nature
Reserve, Leishan County, Guizhou Province, southwest China.
 Habitat: This species grows in evergreen broad-leaved forests on limestone hills at 1,400 m.
IUCN Red List category: Since only one population and a total of 50 mature individuals of
this species were found in the area from where the type collections were made, the species seems
to be very rare and restricted in distribution. A preliminary conservation assessment for the species
gave it Critically Endangered (CR) status, based on criterion D (population less than 50 mature
individuals) of the IUCN Red List criteria (IUCN, 2011). Therefore, careful protection of the
species is warranted. 

R. ledebourii Til L R. leishanicum