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Lars Rosengreen

@shakethetree.net

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. 🏳️‍🌈🏳️‍⚧️

Posts Replies Media

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

Here is another bucket orchid. This one, native to Colombia, is Coryanthes misasii

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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

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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