Hooghly Today : Datura metel Linnaeus

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surajit koley

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Dec 29, 2012, 12:53:26 PM12/29/12
to efloraofindia
Sir,

"Bengal Plants" describes three Datura species :-

Capsule opening irregularly near apex, usually pendent -
    flowers more or less purple ................ fastuosa
    flowers white or cream-coloured .......... fastuosa var. alba
Capsule deeply 4-valved almost to the base, erect; flowers purple
                                                             stramonium var. tatula

I think this species is Datura fastuosa var. alba =  Datura metel Linnaeus.

Regards,

surajit

Datura_29dec12_DSCN0230.jpg
Datura_29dec12_DSCN0231.jpg
Datura_29dec12_DSCN0232.jpg
Datura_29dec12_DSCN0234.jpg
Datura_29dec12_DSCN0235.jpg

Ushadi Micromini

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Dec 30, 2012, 9:58:20 AM12/30/12
to surajit koley, Gurcharan Singh, efloraofindia
Guracharanji:
so does it mean one needs to wait till fruits develop and finally burst open to get an exact classification in case of DATURA?


Surajit: nice pics
Usha di


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Usha di
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Gurcharan Singh

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Dec 30, 2012, 1:44:09 PM12/30/12
to Ushadi Micromini, surajit koley, efloraofindia
Ushadi
Luckily you can distinguish them from vegetative plants and flowers also.

1. Plants glabrescent; calyx 5-angled; corolla less than 12 cm long; 
   leaves sinnuate-dentate, anthers less than 5 mm long
   (capsule erect, 4-valved, with stout up to 5 mm long prickles)...D. stramonium
1a. Plants glabrescent or hairy; calyx cylindrical; corolla
    more than 12 cm long; leaves entire or sinuate but not
    dentate, anthers longer than 1 cm (capsule deflexed, irregularly dehiscent)... 2

2.  Plants gladular-pubescent, not purple; calyx 8-10 cm long; corolla 15-18
    cm long, anthers 10-17 mm long (capsules deflexed, covered with slender
    prickles, pubescent, irregularly dehiscent)......................D. inoxia
2a. Plants glabrescent, often purple; calyx 4-9 cm long; corolla 14-20
    cm long; anthers 10-12 mm long (capsule deflexed, with short
    broad-based short prickles, irregularly dehiscent)...............D. metel 


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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

Ushadi Micromini

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Jan 3, 2013, 4:05:56 PM1/3/13
to Gurcharan Singh, surajit koley, efloraofindia
Thank you Gurcharanji
usha
=
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Usha di
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