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The local Cypripediums (acaule and parviflorum var. pubescens)

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kentuckiense

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We only have two Cyp. species in the immediate Williamsburg area. Unfortunately, with finals and trying to write up my research, I haven't had much time to get out and photograph these guys.

Cypripedium acaule

As you can see, this species LOVES pine straw.


This species has a rather large basal orifice (pollinator exit). Several studies have confirmed that these are pollinated by bumblebees (genus Bombus).


Cypripedium parviflorum var. pubescens

Last spring, this population had 99 blooming stems.


This species has a much smaller basal orifice, indicating pollination by much smaller bees.
 

Heather

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Hoping for photos on my end in about 2 weeks - (at least for parviflorum var. pubescens!)

Nice close up on the acaule - I'm always bugging the hort. staff about what pollinates what.
 
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kentuckiense

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One of my roommates told me about another population of C. acaule he saw while running in the campus woods. I investigated today and got a few photos. I've never seen so many in one place; the ground was absolutely blanketed in some areas. Lots of big clumps, too.





 
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I'm pretty much floored. I've found other cyp species in my home state of Michigan and Ontario, but no acaule...can't imagine having stands like this so close by!
 
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Merv Hall

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Interesting information about the parviflorum. My largest clump last year had 22 blooming growths. This year it dropped to 9. Have grown fifteen years from a mature seedling and this is first decline. Nice to know this can happen in nature too.
 

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