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Wanted : Observations about the types of flowers the Tree Bumblebee visits

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Joined 2014-07-10

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I note you already have cotoneaster horizontalis on your list;  I can only add that, this spring, mine was absolutely covered with tree bumblebees, to the exclusion of other varieties. I wondered if this relative newcomer was excluding other bees from visiting this plant?

     
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Joined 2012-12-02

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Hi, having trawled through my records for the past 3 years, here are some flowers B. hypnorum has visited that are not yet on your list;
Clematis alpine (blue and purple), rosemary, crab apple, dog rose, hebe, Cotinus coggygri, Salvia purpurea, Astrantia, Teucreum (Wall germander), pyracantha, rosebay willow herb.
Louise

     
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Joined 2014-07-28

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This year I began to keep records about the types of flowers   bees are visiting so I am pleased to have the opportunity to use some of this information   already! 
So some additions to the list

Bramble - Rubus sp
Figwort - Scrophularia nodosa
Herb Bennet - Geum urbanum
Lousewort - Pedicularis sylatica
Oil Seed Rape

Hermione

     
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Total Posts: 182

Joined 2013-01-10

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Hi Clive,
Just seen a B. hypnorum queen foraging a cardoon flower; also pollinating my blackberries.
urbanbumble

     
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Joined 2013-06-12

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Himalayan honeysuckle (pheasantberry), and horse chestnut - not seen any for a while , in contrast to other years when tree bees and common carders have been the two species still active in late summer.

     
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Total Posts: 43

Joined 2012-07-27

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Hi Clive a popular plant for my Tree Bees that I don’t see on your list is the Spirea

     
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Total Posts: 78

Joined 2013-06-13

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B.hypnorum workers collection pollen from Sweet briar wild rose in my garden. You can hear them buzzing loudly when they are in the flower - buzz pollination.  Also pratorum workers using this rose.

Kev

     
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Total Posts: 182

Joined 2013-01-10

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Another one:-  foxglove
urbanbumble

     
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Total Posts: 182

Joined 2013-01-10

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Hi Clive ,
On 9.8.2015, I saw B. hypnorum foraging Arctium lappa- which you already list [burdock]; and there was a big queen in the white bell flower of Calystegia sepium - Hedge bindweed.
urbanbumble