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'Rosa acicularis var. engelmannii Crép. ex Rehder syn.' rose Photos
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Rosa acicularis, the Bristly Rose, has a wider distribution than any other Rosa species. From Europe to Asia across the islands of Japan to North America, rightly it's called the Circumpolar Rose. Within that broad range, Washington University botanist Walter Hepworth Lewis recognized two subspecies, a Eurasian octoploid (2n=56) named subsp. acicularis and a North American hexaploid (2n=42) named subsp. sayi. Rosa sayi was named for the American naturalist, Thomas Say. Photographed April 23, 2020 at "Rose Woods.
Uploaded 14 JUL 20 |
Rosa acicularis subsp. sayi grown from seed collected March, 1988 in the Canadian Rockies at about 4500 feet in Banff, Alberta. Photographed April 24, 2018 at "Rose Woods".
Uploaded 14 JUL 20 |
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My plant of subsp. sayi was collected in Minnesota by Carl Luhn of U.C. Davis in 1994. Photographed April 23, 2020 at "Rose Woods".
Uploaded 14 JUL 20 |
Acicularis subsp. sayi wild-collected by Dave Harding in Banff, Alberta in Canada. Photographed at "Rose Woods" May 21, 2020.
Uploaded 14 JUL 20 |
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Unlike the Eurasian subsp. acicularis, the pedicel and hip are smooth with slight glandularness on the sepals of subsp. sayi as shown by my plant from Minnesota. Photographed April 23, 2020 at "Rose Woods in the Mayacmas Mtns. near Petrified Forest, California.
Uploaded 14 JUL 20 |
Acicularis subsp. sayi from Banff, Alberta in Canada. Photographed May 21, 2020 at "Rose Woods".
Uploaded 14 JUL 20 |
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Hips ripen early on my plant of subsp. sayi from Minnesota. Photographed June 12, 2020 at "Rose Woods".
Uploaded 14 JUL 20 |
June 18 2010, Montreal Botanical Garden, Quebec, Canada
Uploaded 27 JUN 10 |
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