One hundred and seventy threatened species were selected as being feasible to grow at the RBGE. Of these 130 have been collected.
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No Scottish accessions yet
Ajuga pyramidalis grows in open areas in the north and west suffers from lost habitat Vulnerable
Alchemilla glaucescens grows in a few places on lime-rich grassland Nationally Scarce
Alchemilla glomerulans appears to be declining in more acidic grassland Vulnerable
Alchemilla wichurae also suffers apparent decline on lime-rich grassland Endangered
Allium oleraceum a declining plant of dry, open ground which is now Vulnerable
Alopecurus borealis an upland species of base-poor flushes, often grazed Nationally Scarce
Arabis alpina very local in Skye. Not in cultivation yet Endangered
Northern Rockcress Arabis petraea grows in the mountains and by the sea Vulnerable
Alpine Bearberry Arctostaphylos alpinus grows in the north Nationally Scarce
Arenaria norvegica ssp. novegica has a few locations north and west Vulnerable
Artemisia norvegica grows on only three mountains Vulnerable
Asplenium obovatum in Scotland only occurs on one outcrop in Kintyre Nationally Scarce
Asplenium septentrionale grows on south-facing rocks Nationally Scarce
Alpine Milk-vetch Astragalus alpinus on limestone in four locations Vulnerable
Purple Milk-vetch Astragalus danicus mostly grows by the sea Endangered
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No Scottish accessions yet
Athyrium distentifolium var. flexile is an endemic variety threatened by lack of winter snow cover
Atriplex praecox a coastal species nearly all in Scotland. None cultivated Nationally Scarce
Bartsia alpina a montane species that requires a host plant None cultivated Nationally Rare
Betula nana grows in upland wet areas mostly in Scotland Nationally Scarce
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No Scottish accessions yet
Blysmus compressus has few sites in Scotland. Seeds fail to germinate Vulnerable