Polypogon spp.

Post by **MWP admin** » Thu May 24, 2007 11:47 am

The best i can do for this grass is Polypogon semiverticillatus. Is it the plant in the photos below??

jackpot · Post by **jackpot** » Thu May 24, 2007 1:43 pm

difficult from a photo but could be the Beardless Rabbitsfoot Grass ) P. viridis)

jackpot · Post by **jackpot** » Thu May 24, 2007 1:44 pm

no, possibly not...

Post by **MWP admin** » Thu May 24, 2007 2:06 pm

JP I found out that Polypogon semiverticillatus and polypogon viridis are synonyms and looks my plant:

Have a look on this link:

http://images.google.com.mt/imgres?imgu ... f%26sa%3DN

photo extracted from the link above:

Post by **MWP admin** » Thu May 24, 2007 2:10 pm

and this link:

http://www.ipe.csic.es/floragon/ficha.p ... &variedad=

Post by **MWP admin** » Sat May 26, 2007 3:34 pm

And here I have another specimen from the same population at Fiddien.

Post by **MWP admin** » Sat May 26, 2007 3:41 pm

While this is for me a typical P.viridis.

Do u confirm?

Edwin Lanfranco · Post by **Edwin Lanfranco** » Sat May 26, 2007 7:08 pm

Again, I concur with JP

Post by **MWP admin** » Sat May 26, 2007 7:16 pm

Erm.., JP first said that it can be P. viridis and then he replied possibly not

So it is P. viridis afterall ?

I know (from Haslam desc.) the latter have semicircular (or half) whorls as in the last photo.

Post by **MWP admin** » Wed Jun 06, 2007 9:21 am

I still have not understood if the photos in the first post are P.viridis or not, and possibly if you can confirm P. viridis shown in the last photo (where I caleld it typical form).

jackpot · Post by **jackpot** » Wed Jun 06, 2007 9:31 am

I only can confirm that I think it could be P. viridis because I know that there are some similar looking species like Agrostis stolonifera...

Post by **MWP admin** » Wed Jun 06, 2007 9:34 am

Ok, lets check this Agrostis stolonifera... TNX JP its a bit clear now...
One differnce I see (which might not be significant) is that the lowermost whorl is somehow more appressed to the stem in the first photos, while pretty patent and undifferentiated in the lower specimen...

Edwin Lanfranco · Post by **Edwin Lanfranco** » Wed Jun 06, 2007 10:27 am

Agrostis stolonifera is a taller plant with larger and looser panicles; it is also perennial

Post by **MWP admin** » Wed Jun 06, 2007 10:59 am

The inflorescence of the latter photo (with half whorls) was about 15cm while the other set of photos above (which look to have full whorls, but maybe I took the photo from that 'frontal' angle where it does not show properely if half or not ) where of the same size or slightly larger.

Latter plants was not more from 50cm high but the former I do not recall, (but surely less from my waist)

Haslam says Agrostis stolonifera 40cm / P. viridis 60cm