Aarti ji if you look at leaves in Echeveria elegans the leaves are almost
rounded with no cusp at tip, whereas in Sempervivum montanum the leaves
 are oblanceolate the tips cuspidate. The real differences are in flowers:

Echeveria: Corolla gamopetalous (petals united at base), corolla lobes
thick and fleshy, stamens 10
Sempervivum: petals free, not thick, stamens more than 10

-- 
Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089
http://www.gurcharanfamily.com/
http://people.du.ac.in/~singhg45/



On Tue, Oct 30, 2012 at 11:29 PM, Aarti S. Khale <[email protected]>wrote:

> Gurcharan ji, Garg ji, Usha di,
> I am confused.
> Similar looking succulent which I have photographed before in a Nasik
> nursery and which is on flowersofindia.net site has been identified as
> Echeveria elegans, common names Mexican Snowball, Hen and Chicks.
> How do you differentiate between Echeveria and Sempervivum?
> For a non botanist like me, both look the same.
> Regards,
> Aarti
>
>
> On Wed, Oct 31, 2012 at 10:11 AM, Gurcharan Singh <[email protected]>wrote:
>
>> Most likely Sempervivum montanum
>>
>>
>> --
>> Dr. Gurcharan Singh
>> Retired  Associate Professor
>> SGTB Khalsa College, University of Delhi, Delhi-110007
>> Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
>> Phone: 011-25518297  Mob: 9810359089
>> http://www.gurcharanfamily.com/
>> http://people.du.ac.in/~singhg45/
>>
>>
>> On Tue, Oct 30, 2012 at 10:44 PM, jmgarg1 <[email protected]> wrote:
>>
>>> Hi, Aarti ji,
>>> What is the bot. name ?
>>>
>>> On 24 October 2012 20:02, Aarti S. Khale <[email protected]> wrote:
>>>
>>>> Usha di,
>>>> Thanks for the id.
>>>> Now I recollect, I have photographed this before in a nursery in Nasik.
>>>> My picture is on 'Flowersofindia' site.
>>>> Thanks for reminding me.
>>>> Regards,
>>>> Aarti
>>>>
>>>>
>>>> On Wed, Oct 24, 2012 at 4:41 PM, ushadi Micromini <
>>>> [email protected]> wrote:
>>>>
>>>>> yes
>>>>> called hens and chicks... as in mother and kids
>>>>> usha di
>>>>>
>>>>> On Sat, Oct 20, 2012 at 10:32 PM, Aarti S. Khale <
>>>>> [email protected]> wrote:
>>>>>
>>>>>> A small ornamental, succulent seen at Pahalgam on 7/9/2011.
>>>>>> Echeveria species?
>>>>>>  Aarti
>>>>>>
>>>>>>  --
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Usha di
>>>>> ===========
>>>>>
>>>>>
>>>>  --
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> With regards,
>>> J.M.Garg
>>> http://en.wikipedia.org/wiki/User:Jmgarg1
>>> 'Creating awareness of Indian Flora & Fauna'
>>> The whole world uses my Image Resource of more than a *thousand species*& 
>>> eight thousand images of Birds, Butterflies, Plants etc. (arranged
>>> alphabetically & place-wise):
>>> http://commons.wikimedia.org/wiki/Category:J.M.Garg. You can also use
>>> them for free as per Creative Commons license attached with each image.
>>> For identification, learning, discussion & documentation of Indian
>>> Flora, please visit/ join our Efloraofindia Google e-group:
>>> http://groups.google.co.in/group/indiantreepix (more than 1980 members
>>> & 1,33,000 messages on 30/9/12) or Efloraofindia website:
>>> https://sites.google.com/site/efloraofindia/ (with a species database
>>> of more than 7500 species).
>>> Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of
>>> India'.
>>>
>>>  --
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>

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