Crocus to identify? Post them here....

[Matt T]

Doubting myself for a moment, but no, probably not. It's rather too large. The markings on the outers are streaking (like biflorus) rather than spotting/stippling.  Also, Janis says that "in C. danfordiae the stigmatic branches rarely reach higher than the middle of the anthers and never surpass them" and "the throat colour is usually pale yellowish and small" - the yellow throat is quite extensive on your plant.

[tonyg]

I got this nice little crocus as C danfordiae, but the flower seems rather larger than I expected.

I would go with Blue Pearl - although an image search does yield some variation 
Blue Pearl is widely and cheaply available so it's a likely candidate for this imposter.  You rarely get a rarity as an imposter.

[Janis Ruksans]

I got this nice little crocus as C danfordiae, but the flower seems rather larger than I expected.

Some of biflorus group.
Janis

[Roma]

A stranger in a pot of Crocus flavus

[arilnut]

Hi Roma. I would say reticulatus.

John B

[Roma]

I think that unlikely, John. The corms were bought in autumn from Potterton's nursery and I assume they buy in most of the crocuses they sell large numbers of.  They do not have reticulatus in their catalogue.  It is not uncommon to get mixed or wrongly named bulbs and corms from Dutch wholesalers.

[Thomas Huber]

Roma, I guess you would have noticed the strongly reticulated corm tunics of Crocus reticulatus between C. flavus corms....
To me it looks like Crocus versicolor, but to be sure a look at the corm tunic would help.

[tonyg]

A stranger in a pot of Crocus flavus

I think you are right about these being bought in, although they do grow some bulbs in frames for future sales.  I am with Thomas, this looks like C versicolor, almost certainly the clone Picturatus.  Take  a look at google images and you'll see what I mean.

[Roma]

Thanks Thomas and Tony.  I will check the corm when the leaves die down.  I plan to plant them in my lawn.  Crocus pulchellus are all over it so it would be good to have some spring crocuses there as well.

[Thomas Huber]

Roma, in my own crocus lawn C. flavus is not really happy, but always worth a try, maybe your lawn is better suited for this species.

[anita]

Hi, I've got a potful of unidentified autumn blooming crocus, grown from Marcus Harvey seed, unfortunately the tag has been broken and of course the missing bit is the species (and the sowing date!).
I was wondering if the brains trust might be able to help me at least identify the pot correctly. If its of any assistance this potful is flowering simultaneously with C goulimyi, C niveus and C. tournfortii. Thanks Anita

[tonyg]

Hi, I've got a potful of unidentified autumn blooming crocus, grown from Marcus Harvey seed, unfortunately the tag has been broken and of course the missing bit is the species (and the sowing date!).
I was wondering if the brains trust might be able to help me at least identify the pot correctly. If its of any assistance this potful is flowering simultaneously with C goulimyi, C niveus and C. tournfortii. Thanks Anita

First impression suggests Crocus thomasii or Crocus oreocreticus.  Maybe one name or the ohter will spark a memory 

[anita]

Thanks Tony, C. thomasii sounds likely. Anita

[Hoy]

Is this Crocus flavus or a cross?

http://www.biologforeningen.org/enbiolog/topic.asp?TOPIC_ID=55570

[tonyg]

Is this Crocus flavus or a cross?

http://www.biologforeningen.org/enbiolog/topic.asp?TOPIC_ID=55570

That is a very tricky one.  I can only make observations on what I can see. 
The flowers have some characteristics of Crocus flavus but none of the flavus that I have raised from seed have had the dark stripe/stripes on the outside of the flower.  When I see your plant I am reminded of the cultivar 'Dutch Yellow' or 'Yellow Mammoth' which is considered as x stellaris or x luteus 'Stellaris.'  This is a supposed hybrid: Crocus angustifolius x Crocus flavus, it is listed as a sterile hybrid.  Crocus angustifolius has dark stripes/blotch on the outer petals but much more prominent than in these flowers.