The York Street gardens will close at 3 p.m. on Wednesday, July 17 for a private event and close at 3 p.m. on Thursday, July 18 for a concert.

Colorado hookless cactus (Sclerocactus Glaucus) in bloom

Rare Spring Blooms

June 6, 2019 | Michelle DePrenger-Levin
On the western slope of Colorado you will find populations of a rare ball cactus with lilac flowers that bloom a few days a year when the sun is shining and pollinators are flying. Each Colorado hookless cactus ( Sclerocactus glaucus ) flower produces over a hundred seeds and those that germinate...Learn more
Sclerocactus glaucus cactus

Tracking Cactus Populations

May 16, 2018 | Research & Conservation
Sneaky Spines and Careful Measurements Sweeping western slope views, slightly menacing rain clouds and beautiful, tough plants surrounded us. I listened for my field partner to shout out cactus dimensions and wrote each number into its proper cell on the data sheet while picking prickly pear spines...Learn more
Monitoring Sclerocactus glaucus

Winter Planning for Summer Research Projects

February 28, 2018 | Research & Conservation
Many of the beautiful places where we study plants and mushrooms are dormant and snow-covered this time of year, but the Research & Conservation department is still humming with activity! In the winter, our staff and volunteers identify herbarium specimens collected the previous year, analyze...Learn more
Pollinator visiting Sclerocactus glaucus (Colorado hookless cactus)

Pollination Research

June 19, 2013 | Rebecca Hufft, Ph.D.
Pollinators provide critical ecosystem services. Pollinator research is important to better understand the relationships between pollinators and plants and to improve conservation and management of both plants and pollinators. Here at the Gardens we work with roughly 70 of Colorado’s most rare and...Learn more
What threatens the Colorado hookless cactus?

What threatens the Colorado hookless cactus?

May 19, 2009 | Michelle DePrenger-Levin
What threatens Sclerocactus glaucus ? Installation and maintenance of huge pipelines that move oil and gas from the well pads miles and miles to the collection facilities; roads; browsing and trampling from livestock; weeds; and people who collect them from the wild to name a few. Why are we doing...Learn more
Denver Botanic Gardens spends springtime in the field

Denver Botanic Gardens spends springtime in the field

May 8, 2009 | Michelle DePrenger-Levin
Each year, as spring rolls around, the Research and Conservation staff load up a 4-wheel drive vehicle with our gear, head out across Colorado and the Rocky Mountain west region in search of rare plants. Our first trip takes us west to the threatened cactus, Sclerocactus glaucus . This lovely...Learn more