Rashida ji Stem is developed in both. In practice in shrubs the branches arising from base are known as stems only. The difference is of common stem better known as trunk. In trees we have a trunk which is single for some distance after which the branches arise (E. nivulia and others). In Shrubs there is no trunk and individual branches (stems) arise from the base.
-- 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://people.du.ac.in/~singhg45/ On Fri, Mar 11, 2011 at 8:35 PM, Gurcharan Singh <singh...@gmail.com> wrote: > Thanks a lot Pankaj ji > > Members can take help of both the keys. > > > -- > > 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://people.du.ac.in/~singhg45/ > > > On Fri, Mar 11, 2011 at 8:25 PM, Pankaj Kumar <sahanipan...@gmail.com>wrote: > >> Stem without spines >> Leaves red/brown/reddish-brown …………………………........Euphorbia cotinifolia >> Leaves green or green with variegations >> Leaves usually present for short >> duration towards the terminal end of stem ..……………......Euphorbia >> tirucallii >> Leaves present for longer duration >> not just confined to the terminal ends >> Leaves alternate scattered distichously …………............Euphorbia >> tithymaloides >> Leaves alternate, scattered spirally >> (not distichously atleast) >> Bracts uniformly coloured >> (yellow or red or white in colour) …………………….......Euphorbia >> pulcherrima >> Bracts coloured but not completely >> Bracts red coloured towards >> the basal part ……………………………......………...Euphorbia >> heterophylla >> Bracts white coloured towards >> the basal part …………………………………....……...Euphorbia cyathophora >> >> Stem with spines >> Stem red/brown/reddish-brown in colour, >> normally not more than 1.5cm thick ……………………….......Euphorbia milii >> >> (excluding polyploid hybrids) >> Stem green/white/greyish-green/variegated, >> normally more than 3cm thick >> Stem almost cylindric >> Trunk absent, place of attachment >> of spines raised ……………………………………..............Euphorbia >> caducifolia >> Trunk present, place of attachment >> of spines almost embedded atleast not raised …………...Euphorbia >> nivulia >> Stem angular or winged >> Wings 3-4 >> Wings straight, sinuate or dentate >> Stem green without >> white bands >> …………………..............................…Euphorbia antiquorum >> Stem variegated with >> white or white bands >> between two wings >> …………..…......................…...Euphorbia lactea >> Wings spiral ………………………........................…….Euphorbia >> tortilis >> Wings 5-6 ……………………………......................…...….Euphorbia >> royleana >> >> Varieties may be kept separately I assume. >> Key is 98% yours and I just added and deleted few things so even less than >> 2% of my knowledge involved. >> Regards >> Pankaj >> >> >> -- >> *********************************************** >> "TAXONOMISTS GETTING EXTINCT AND SPECIES DATA DEFICIENT !!" >> >> >> Pankaj Kumar Ph.D. (Orchidaceae) >> Research Associate >> Greater Kailash Sacred Landscape Project >> Department of Habitat Ecology >> Wildlife Institute of India >> Post Box # 18 >> Dehradun - 248001, India >> >> > > >
