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Lars Rosengreen

@shakethetree.net
32 followers 15 following 13 posts

I like plants 😬 Horticulturalist, botanist, photographer, and sometimes adventurer. I manage the Greenhouse Facility @SJSU, and am curator of the university's Carl W. Sharsmith Herbarium. 🏳️‍🌈🏳️‍⚧️

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Lars Rosengreen @shakethetree.net · 04/02/2025
What is old grandpa Schumer doing about it besides looking sternly at the camera over his reading glasses?
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Lars Rosengreen @shakethetree.net · 04/02/2025
My first job after college was funded by a US AID grant. No matter your politics, I hope we can all agree that making the world a better place is a good thing. US AID makes that possible by judiciously funding relatively small grants. Now Trump and Musk are destroying it, just because they can.
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Reposted by Lars Rosengreen
Botany One @botany.one · 02/02/2025
📝 An Anonymous Botanist has Poisoned a Herbarium in New York in an Unusual Way 🧵 doi.org/n4tf My guess: Professor Plum, in the LuEsther T. Mertz Library, with the suspicious green bottle. #Botany #PlantScience 🧪 #InBrief Herbaria are essential tools for Botany.
A skull, in front on a table, three bottles of coloured liquid with eldritch smoke around them.
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Lars Rosengreen @shakethetree.net · 20/01/2025
Greetings from Kirkwood where the weather was awesome, the snow was …eh and a little thin, and the company was amazing ❤️
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Lars Rosengreen @shakethetree.net · 15/12/2024
Here is Cattleya cernua (formerly Sophronitis cernua) blloming in SJSU’s Temperate Greenhouse. Native to Brazil, Bolivia, Paraguay, and Argentina. It is pollinated by hummingbirds. The Greenhouse Facility at SJSU houses approximately 400 species of orchids for class use and for research. #SJSU 🧪
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Lars Rosengreen @shakethetree.net · 15/12/2024
This is also the time of year when the elves are about. Here is a specimen in the SJSU Sharsmith Herbarium’s Elves of North America collection. In addition to their festive cheer, elves are also an important food source for raptors like golden eagles.
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Lars Rosengreen @shakethetree.net · 15/12/2024
This time of year is when most of the Angaecums start to bloom. Here are two of them: A. leonis and A. didieri in SJSU’s Temperate House. Our Darwin’s orchid (A. sesquipedalis) is also in bud. #SJSU #SJSUScience
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Lars Rosengreen @shakethetree.net · 25/11/2024
Awwww 😍
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Lars Rosengreen @shakethetree.net · 25/11/2024
Here is another bucket orchid. This one, native to Colombia, is Coryanthes misasii
The bucket orchid Coryanthes misasii
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Lars Rosengreen @shakethetree.net · 25/11/2024
I like the b&w photo better because it really emphasizes the structure of the grapes
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Lars Rosengreen @shakethetree.net · 24/11/2024
This kind of bizarre looking thing is a bucket orchid; in this case the species Coryanthes bergoldii. We have about 18 different species of bucket orchids at SJSU.
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Lars Rosengreen @shakethetree.net · 24/11/2024
I’m starting off with a bunch of pictures from SJSU’s greenhouses, but my plan is to use this as a personal account. I do have an account on IG: sjsugreenhouse that you can follow there if you just want plant pictures 🙂. Maybe II’ll eventually bring that account over here too.
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Lars Rosengreen @shakethetree.net · 24/11/2024
Rossioglossum Rawdon Jester, a really nice larger-flowered member of the Oncidium group of orchids. This plant came to SJSU thanks to the estate of Ernest Littauer. The Littauer family donated well over 100 large orchids to SJSU. I will share more of them when they flower.
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Lars Rosengreen @shakethetree.net · 23/11/2024
A beautiful and fragrant Zygopetalum orchid blooming in SJSU’s Cold House. This plant comes from SJSU alum and expert orchid grower Ed Nazzal’s collection. Ed has donated many large orchids to the greenhouse facility, and it’s always a treat when one begins to flower. Thank you Ed! #SJSU
Zygopetalum orchid in flower in SJSU’s Greenhouse Facility
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