Hi.
How can I identify species Urtica dioica from Urtica radicans? Can someone
help, please?
Also there is another question:
http://img254.imageshack.us/my.php?i...6270024zc1.jpg
http://img263.imageshack.us/my.php?i...6270027gi1.jpg
It is a small plant that I've found on the sunny side of an derelict sandy
road. The flowers you can see on the photos are about 5mm broad. The
surounding habitat is marshland or wet...

In message , janka
writes
Hi.
How can I identify species Urtica dioica from Urtica radicans? Can someone
help, please?
Also there is another question:
http://img254.imageshack.us/my.php?i...6270024zc1.jpg
http://img263.imageshack.us/my.php?i...6270027gi1.jpg
It is a small plant that I've found on the sunny side of an derelict sandy
road. The flowers you can see on the photos are about 5mm broad. The
surounding habitat is marshland or wet...


Try Centaurium, or possibly Gentianella, or some related genus in
Gentianaceae.
--
Stewart Robert Hinsley

"janka" wrote in message
...
Hi.
How can I identify species Urtica dioica from Urtica radicans? Can someone
help, please?

There is not much that I can find on the internet about U. radicans and no
descriptons. This link, http://tinyurl.com/2scjns suggests that it is a
synonym for Adicea radicans, on which I draw a complete blank. Where is it
found? What is the source for the name?

Also there is another question:
http://img254.imageshack.us/my.php?i...6270024zc1.jpg
http://img263.imageshack.us/my.php?i...6270027gi1.jpg
It is a small plant that I've found on the sunny side of an derelict sandy
road. The flowers you can see on the photos are about 5mm broad. The
surounding habitat is marshland or wet...
Yes - the pink flower looks very much like Centaurium, but difficult from
visible detail to say which one. Possibly C. erythrea (Common Centaury).
Calix does not look right for Gentianella.

There is not much that I can find on the internet about U. radicans and no
descriptons. This link, http://tinyurl.com/2scjns suggests that it is a
synonym for Adicea radicans, on which I draw a complete blank. Where is
it found? What is the source for the name?

Area of my interest are wet and flooded sites in the region southerwards
Drava river, Croatia.
I've found in books that two different authors have been found Urtica
radicans and Urtica dioica species in the floristic composition of this
specific terain, but I have no idea how to distinguish those plants. In the
key I use, there is not Urtica radicans mentioned at all. Nettles are very
abundant here, particularly beneath forest stands of alder (phytocenosis of
common alder with elongated sedge=Carici elongatae-Alnetum glutinosae and
phytocenosis of common alder and narrow-leaved ash with
birdcherry=Pruno-Fraxinetum)

Yes - the pink flower looks very much like Centaurium, but difficult from
visible detail to say which one. Possibly C. erythrea (Common Centaury).
Calix does not look right for Gentianella.
Yes! After Steward's reply I've searched for Centaurium genus. I'm quite
sure that this flower must be Centaurium pulchellum. Thanks!

In message , janka
writes
There is not much that I can find on the internet about U. radicans and no
descriptons. This link, http://tinyurl.com/2scjns suggests that it is a
synonym for Adicea radicans, on which I draw a complete blank. Where is
it found? What is the source for the name?

Area of my interest are wet and flooded sites in the region southerwards
Drava river, Croatia.
I've found in books that two different authors have been found Urtica
radicans and Urtica dioica species in the floristic composition of this
specific terain, but I have no idea how to distinguish those plants. In the
key I use, there is not Urtica radicans mentioned at all. Nettles are very
abundant here, particularly beneath forest stands of alder (phytocenosis of
common alder with elongated sedge=Carici elongatae-Alnetum glutinosae and
phytocenosis of common alder and narrow-leaved ash with
birdcherry=Pruno-Fraxinetum)

I've checked the Flora Europaea database online at

http://rbg-web2.rbge.org.uk/FE/fe.html

and it doesn't list Urtica radicans at all. Elsewhere I find Urtica
radicans referred to Urtica kioviensis Rogow., which is listed in Flora
Europaea.

Yes - the pink flower looks very much like Centaurium, but difficult from
visible detail to say which one. Possibly C. erythrea (Common Centaury).
Calix does not look right for Gentianella.
Yes! After Steward's reply I've searched for Centaurium genus. I'm quite
sure that this flower must be Centaurium pulchellum. Thanks!



--
Stewart Robert Hinsley

Janka

I have enquired with a friend who is a botanist and has been to Croatia
several times, but he does not know of this species.

Can you recommend a good Flora book for Croatia?

Peter

"janka" wrote in message
...
There is not much that I can find on the internet about U. radicans and
no descriptons. This link, http://tinyurl.com/2scjns suggests that it is
a synonym for Adicea radicans, on which I draw a complete blank. Where
is it found? What is the source for the name?

Area of my interest are wet and flooded sites in the region southerwards
Drava river, Croatia.
I've found in books that two different authors have been found Urtica
radicans and Urtica dioica species in the floristic composition of this
specific terain, but I have no idea how to distinguish those plants. In
the key I use, there is not Urtica radicans mentioned at all. Nettles are
very abundant here, particularly beneath forest stands of alder
(phytocenosis of common alder with elongated sedge=Carici
elongatae-Alnetum glutinosae and phytocenosis of common alder and
narrow-leaved ash with birdcherry=Pruno-Fraxinetum)

Yes - the pink flower looks very much like Centaurium, but difficult from
visible detail to say which one. Possibly C. erythrea (Common Centaury).
Calix does not look right for Gentianella.
Yes! After Steward's reply I've searched for Centaurium genus. I'm quite
sure that this flower must be Centaurium pulchellum. Thanks!

Can you recommend a good Flora book for Croatia?

Peter

Hi Peter,
the flora key that I found most helpfull is DOMAC R., 1979: ''Mala flora
Hrvatske i susjednih podrucja''. Skolska knjiga, Zagreb. Unfortunatelly,
this book's third edition is the most recent of this kind (as far as I know)
and exists only in croatian language.
Else, you can check this link for books on this subject:
http://public.srce.hr/botanic/cisb/d...iteratura.html

Popular summary of hither most common trees, brushwood, endemic and
decorative plants, authors ©iliæ and Laku¹iæ have published in five books
with pictures and photos. Those are usually available in antique book-shops:
©iliæ,È., 1973: Atlas drveæa i grmlja. Priroda Jugoslavije Zavod za
izdavanje udzbenika,Sarajevo.
©iliæ,È ., 1977: ©umske zeljaste biljke. Priroda Jugoslavije Svjetlost,
Sarajevo

©iliæ,È ., 1984: Endemiène biljke. Priroda Jugoslavije Svjetlost, Sarajevo

©iliæ,È ., 1990: Ukrasno drveæe i grmlje. Priroda Jugoslavije Svjetlost,
Sarajevo

Laku¹iæ,R ., 1982: Planinske biljke. Priroda Jugoslavije Svjetlost, Sarajevo



-------------

Janka