 
Rhododendron quadrasianum var. quadrasianum
Section Discovireya
Height - 3m - mostly terrestrial
Leaves - obovate - 3.0 x 1.3cm
Flowers - tubular - 1.8cm - usually solitary or in pairs
Location - Philippines: Luzon: Mayon Volcano; Mindoro:
Mt. Isarog - 1330-2100m
Epithet - after J. F. Quadras, a friend of Vidal who
collected in the Philippines.
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Rhododendron quadrasianum var. davaoense
Section Discovireya
Height - 3m - mostly terrestrial
Leaves - obovate - 2.8 x 1.0cm
Flowers - sub-campanulate - 1.6cm - usually solitary
or in pairs
Location - Philippines: Mindanao: Leyte, Negros, S.Luzon
- 1600-2440m
Epithet - after J. F. Quadras, a friend of Vidal who
collected in the Philippines; var. after
Davao, the province where first collected.
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Rhododendron quadrasianum var. malindangense
Section Discovireya
Height - 7m - mostly terrestrial
Leaves - obovate - 2.5 x 1.0cm
Flowers - cylindrical - 2.5cm - usually solitary or
in pairs
Location - Philippines: Mindanao: Camiguin - 1000-1600m
Epithet - after J. F. Quadras, a friend of Vidal who
collected in the Philippines; var. after
mountain on which first collected.
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Rhododendron quadrasianum var. marivelesense
Section Discovireya
Height - 6m - mostly terrestrial
Leaves - obovate - 2.0 x 0.8cm
Flowers - tubular - 1.7cm - usually solitary or in pairs
Location - Philippines: Luzon: Mindoro - 1200-2500m
Epithet - after J. F. Quadras, a friend of Vidal who
collected in the Philippines; var. after
mountain on which first collected.
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Rhododendron quadrasianum var. rosmarinifolium
Section Discovireya
Height - 2m - mostly terrestrial
Leaves - narrowly elongate-obovate - 2.2 x 0.6cm
Flowers - elongate campanulate - 1.6cm - usually solitary
or in pairs
Location - Philippines: Mindoro, Biliran, Luzon, Negros
- 1300-2400m
Epithet - after J. F. Quadras, a friend of Vidal who
collected in the Philippines; var. alluding
to the similarity of the leaf to the herb rosemary.
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