#Hydrangeaceae

🌴 Scott Zona, Ph.D. 🌴

@scottzona.bsky.social

8 months ago

Close-up photo of elongate clusters of small, fertile flowers interspersed with large, sterile flowers. Photo by Scott Zona CC BY-NC 2.0.

Photo of a lacecap inflorescence of small, fertile flowers surrounded by a few, large sterile flowers. Photo by Scott Zona CC BY-NC 2.0.

Photo of a lacecap inflorescence of small, purple, fertile flowers surrounded by a few, large, pale, sterile flowers. Photo by Scott Zona CC BY-NC 2.0.

Bonus sterile flower post: Here are a few more Hydrangea species that have large sterile and small fertile flowers.
1. H. quercifolia
2. H. aspera
3. H. involucrata 'Wim Rutten'
#Hydrangeaceae #pollination #Botany 🌾🧪🌱

🌴 Scott Zona, Ph.D. 🌴

@scottzona.bsky.social

8 months ago

Photo of an inflorescence of small, fertile flowers surrounded by a few, large sterile flowers. Photo by Scott Zona CC BY-NC 2.0.

Hydrangea macrophylla also has “lacecap” cultivars. In these, like this 'Frau Reiko', the inflorescence is flatter, & the sterile flowers are limited to the periphery of the inflorescence. Fertile flowers are a small but significant part of the display. #Hydrangeaceae #pollination #Botany 🌾🧪🌱

🌴 Scott Zona, Ph.D. 🌴

@scottzona.bsky.social

8 months ago

Photo of a large, globose cluster of blue sterile flowers. Photo by Scott Zona CC BY-NC 2.0.

We see nothing but sterile flowers in the “mophead” Hydrangea macrophylla. There are fertile flowers, but they’re small and hidden under the large, sterile flowers. This is ‘Endless Summer’. #Hydrangeaceae #pollination #Botany 🌾🧪🌱

🌴 Scott Zona, Ph.D. 🌴

@scottzona.bsky.social

8 months ago

Photo of large, globose clusters of sterile white flowers. Photo by Scott Zona CC BY-NC 2.0.

Close-up photo of an isolated branch of the inflorescence showing sterile flowers on the longer branches and fertile, apetalous flowers born on shorter stalks. Photo by Scott Zona CC BY-NC 2.0.

I’ve posted about showy bracts that add to a floral display, but this week, I’m posting on sterile flowers that add to the display. No plant does it better than Hydrangea arborescens. What we see are sterile flowers. The fertile flowers are small & hidden. #Hydrangeaceae #pollination #Botany 🌾🧪🌱

🌴 Scott Zona, Ph.D. 🌴

@scottzona.bsky.social

10 months ago

Close-up photo of a leafless twig with a terminal bud and emerging leaves. The bud has several, brown, triangular protective scales that open to release the emerging leaves. Photo by Scott Zona CC BY-NC 2.0.

Many temperate plants were described as “perulate” meaning that the overwintering buds are covered by bud scales (nowadays rarely called perulae). You can see the brown bud scales here on this shoot of Hydrangea quercifolia. They are just modified leaves. #Hydrangeaceae #bracts #Botany 🌾🧪🌱

Botanical Society of America

@botsocamerica.bsky.social

1 year ago

Hydrangea aspera Buch.-Ham. ex D.Don (Hydrangeaceae) is a shrub indigenous to the mesic areas in Asia. In their study, Schenk et al. determined that Hydrangeaceae underwent three significant shifts toward increased diversification rates, although H. aspera was not part of the radiations. A similar pattern of three significant shifts toward increased diversification rates were also identified in Loasaceae. Although an ecological transition accompanied by a speciation rate increase was noted in a clade of Philadelphus (Hydrangeaceae), and a biogeographic transition occurred with an increased speciation shift in a clade of Deutzia (Hydrangeaceae), the only clade that exhibits a phylogenetic pattern consistent with ecological opportunity was Mentzelia section Bartonia (Loasaceae), which diversified in Mesoamerica where the two families originated. Photo by J. Schenk.

Comparative diversification analyses of #Hydrangeaceae & #Loasaceae reveal complex evolutionary history as species disperse out of Mesoamerica

New #AJBN research by @johnjschenk.bsky.social, Sarah Jacobs & Larry Hufford

doi.org/10.1002/ajb2... #Botany #plantscience #hydrangea #evolution

ChaoticGardener

@thechaoticgardener.bsky.social

1 year ago

A mass of small petals, light green with pinkish margins, are displaying their contrasting veins

#Hydrangea macrophylla 'Leuchtfeuer' fading from its original deep red
#Hydrangeaceae
#sydney #garden #BalconyGarden #FlowerReport #flowers #BloomScrolling #UrbanGarden #UrbanPlanting 🌱

🌴 Scott Zona, Ph.D. 🌴

@scottzona.bsky.social

1 year ago

Photo of a mophead Hydrangea with sterile florets turning green and purple.

Has anyone else noticed a spicy fragrance from aging Hydrangea macrophylla inflorescences like these? There is no aroma from the flowers at anthesis, but aging inflorescences seem to have a faint, fleeting fragrance… unless my nose is hallucinating. #Hydrangeaceae #Hydrangea #Botany 🌾🧪🌱

La Voyageuse Sans Ticket ☂️🦊

@janevoyage.bsky.social

1 year ago

Seringat des jardins à côté de l'église protestante de mon quartier.

Seringat en plan rapproché sur fleurs et feuillage.

Seringat. Gros plan sur ses fleurs et son feuillage.

1/2 Le saviez-vous ? Le seringat des jardins (Philadelphus coronarius L.) est de la même famille que l'hortensia, les Hydrangeaceae. Son nom vernaculaire viendrait, paraît-il, d'une coutume ancienne qui consistait à évider ses tiges pour en faire des seringues.
🌱
#Seringat #hydrangeaceae