Awesome pictures with all the details shown clearly ; and taxonomic description ! . On Saturday, September 10, 2011 at 10:01:46 AM UTC+5:30 Gurcharan Singh wrote:
> *Sida yunnanensis* Hu, Fl.China,fam. 153.16.t.16.f.7. 1955 > > I have been working on this plant for some time, similar to what Balkar ji > uploaded as Sida sp. from Panipat and Tanay identified as S. rhomboidea > (another but not accepted now name for S. rhombifolia). This interesting > plant at first sight appears to be Sida rhombifolia var. obovata as per > brief description in Flora of British India. As per eFlora of Pakistan this > is a synonym of Sida yunanensis but according to eFlora of China it is a > synonym of S. alinifolia var. obovata. Author of eFlora of China was aware > of this when he writes "The original author suggested that *Sida > yunnanensis* was related to *S. spinosa* Linnaeus, but it is > distinguished by the broadly elliptic or obovate leaf blades > (ovate-lanceolate in *S. spinosa*), shorter petioles (3-7 mm as opposed > to 2-20 mm in *S. spinosa*), and the absence of the short nodal spines > characteristic of *S. spinosa*. Paul (Fl. India 3: 290. 1993) included *S. > yunnanensis*within *S. rhombifolia* var. *rhombifolia*, while Abedin (Fl. > W. Pakistan 130: 81. 1979) accepted it and extended it to include material > from India, Kashmir, Myanmar, and Pakistan." > > Now let us understand this plant, the leaves are elliptic-obovate, up to 5 > cm long, clearly closely white tomentose beneath especially in plants of > dry habitats, leaves more straight at less wrinkled as compared to other > species, significantly flowers tend to be occurring in clusters mostly on > short axillary branches, calyx is sparcely hairy, flowers yellow about 1 cm > across and most importantly in all my specimens carpels are five, the 5 > mericarps in fruit have very small (hardly 1 mm) awns closely converging. > > To arrive at better conclusion I tried to identify this plant from keys > given in both floras, and in both cases the key led me to S. yunanensis > (characterised by leaves up to 5 cm long, broadly elliptic to obovate, > flowers in fascicles, mericarps 5 (-7), with less than 2 mm long awns). > Why it can't be S. alnifolia var. obovata as per description provided > by eFlora of China is that it has smaller than 2 cm leaves, flowers > solitary, and 6-8 mericarps. > > The plant was photographed in Vikas Puri, New Delhi, growing in a > neglected area in Park. Very common in Delhi. > > Your comments please. > > > > -- > 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/ > > -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/indiantreepix/a67cce01-7a13-4487-9d9a-07b976787ceen%40googlegroups.com.
