Hydrangea × ytiensis
Sponsor
Kindly sponsored by a generous supporter who loves hydrangeas.
Credits
Julian Sutton (2025)
Recommended citation
Sutton, J. (2025), 'Hydrangea × ytiensis' from the website Trees and Shrubs Online (treesandshrubsonline.
Synonyms
- × Didrangea ytiensis J.M.H.Shaw
Other taxa in genus
- Hydrangea ampla
- Hydrangea angustipetala
- Hydrangea anomala
- Hydrangea arborescens
- Hydrangea arborescens Species Complex Cultivars A–M
- Hydrangea arborescens Species Complex Cultivars N–Z
- Hydrangea aspera
- Hydrangea aspera Species Complex Cultivars
- Hydrangea barbara
- Hydrangea bretschneideri
- Hydrangea cinerea
- Hydrangea daimingshanensis
- Hydrangea davidii
- Hydrangea fauriei
- Hydrangea febrifuga
- Hydrangea glaucescens
- Hydrangea heteromalla
- Hydrangea heteromalla Species Complex Cultivars
- Hydrangea hirsuta
- Hydrangea hirta
- Hydrangea hwangii
- Hydrangea hydrangeoides
- Hydrangea indochinensis
- Hydrangea integrifolia
- Hydrangea Intersectional Hybrids
- Hydrangea involucrata
- Hydrangea kawakamii
- Hydrangea kwangsiensis
- Hydrangea liukiuensis
- Hydrangea lobbii
- Hydrangea longifolia
- Hydrangea longipes
- Hydrangea luteovenosa
- Hydrangea macrophylla
- Hydrangea obtusifolia
- Hydrangea paniculata
- Hydrangea paniculata Cultivars A–D
- Hydrangea paniculata Cultivars E–I
- Hydrangea paniculata Cultivars J–L
- Hydrangea paniculata Cultivars M–R
- Hydrangea paniculata Cultivars S–Z
- Hydrangea petiolaris
- Hydrangea platyarguta
- Hydrangea pottingeri
- Hydrangea quercifolia
- Hydrangea radiata
- Hydrangea robusta
- Hydrangea sargentiana
- Hydrangea scandens
- Hydrangea schizomollis
- Hydrangea Section Macrophyllae Cultivars A
- Hydrangea Section Macrophyllae Cultivars B
- Hydrangea Section Macrophyllae Cultivars C
- Hydrangea Section Macrophyllae Cultivars D
- Hydrangea Section Macrophyllae Cultivars E–F
- Hydrangea Section Macrophyllae Cultivars G
- Hydrangea Section Macrophyllae Cultivars H
- Hydrangea Section Macrophyllae Cultivars I–J
- Hydrangea Section Macrophyllae Cultivars K
- Hydrangea Section Macrophyllae Cultivars L
- Hydrangea Section Macrophyllae Cultivars M
- Hydrangea Section Macrophyllae Cultivars N–O
- Hydrangea Section Macrophyllae Cultivars P–Q
- Hydrangea Section Macrophyllae Cultivars R
- Hydrangea Section Macrophyllae Cultivars S
- Hydrangea Section Macrophyllae Cultivars T–U
- Hydrangea Section Macrophyllae Cultivars V–Z
- Hydrangea seemannii
- Hydrangea serrata
- Hydrangea serratifolia
- Hydrangea sikokiana
- Hydrangea species of Section Cornidia
- Hydrangea species of Sections Cardiandra and Deinanthe
- Hydrangea strigosa
- Hydrangea stylosa
- Hydrangea tomentella
- Hydrangea × versicolor
- Hydrangea viburnoides
- Hydrangea villosa
- Hydrangea xanthoneura
This name was coined for the Crûg Farm collection BSWJ 11790 (Y-Ty, N Vietnam, 2006), made from a solitary, purple-leaved, 1.5 m tall shrub initially identified as Hydrangea lingii. It has only fertile flowers, with blue/purplish/pink petals. Shaw (2014) interprets it as a hybrid between the Vietnamese plant he identifies as H. davidii, and a dichroa found in the area, H. aff. hwangii. The main evidence of hybridity seems to be the presence of some flowers with slightly enlarged calyx lobes, especially near the apex of inflorescence branches where the sterile flowers would be found in a conventional hydrangea. Most flowers have some stamens with widened, petaloid filaments and connectives; pollen grains appear to abort.
Leaves are glossy, elliptic and quite thick, with finely toothed margins and sparse, stiff hairs on the upper surface (Crûg Farm Plants 2025; pers. obs. at Crûg Farm 2023). Leaves are not purple in the garden at Crûg, probably due to lack of sun. This is best treated as an experimental and rather tender subject, with much still to be understood.
