Much of our Typha angustifolia material may have to be shifted to T. domingensis

[Gurcharan Singh]

Dear friends,

Much of material in Indian Infloras has been placed under Typha angustata Bory & Chaubard. As it turns out that T. angustata Bory & Chaubard is now treated as synonym of T. domingensis Pers. Recently Suman Halder, P. Venu and Y.V. Rao, 2014 (The distinct Typha angustifolia (Typhaceae) ignored in Indian floras, Rheedea 24(1): 16-20 have concluded that some material under T. angustata may belong to T. angustifolia,  though not as prevalent as T. domingensis (=T. angustata). It may thus be concluded:

1. Material of T. angustata in India may belong to either T. domingensis or T. angustifolia.

2. T. domingensis is much more widely distributed than T. angustifolia in India.

3. Perhaps no city in India has so much abundance of Typha angustata as Kashmir valley, and all major herbaria are full of specimens from Kashmir. The above paper does not cite any specimen from Kashmir in distribution of T. angustifolia, obviously all of it belongs to T. domingensis.

    Here is the list of differences between the two species taken from above paper as well as Flora of China. Unfortunately, however, most of these differentiating characters are microscopic and may not be available in photographs we have, but may help in future photography of specimens:

T. angustifolia                                                   T. domingensis

1. Leaf sheaths auriculate at tip                   1. Leaf sheaths taper into lamina

2. Upper surface of leaf with brown spots.    2. Brown spots absent

3. Male part of spike ca 8 cm                         3. Male part of spike 7-30 cm

4. Compound pedicels of female flowers       4. Compound pedicels of female

     slender with brown streaks                            flowers dark brown and stumpy

5. Perigonial hairs of female flowers              5. Perigonial hairs of female flowers

    shorter and below stigma                               as equal to stigma

6. Colour of Female flower bracts                  6. Colour of Female flower bracts

     dark brown                                                     translucent

7. Staminate bracts forked at apex                7. Staminate bracts laciniate

8. Anthers twisted after dehiscence               8. Anthers not twisted after dehiscence

9. Anther 1.3-1.8 mm long                             9.  Anther ca 1.4 mm long

10. Stigmas ca as broad as style                  10. Stigmas broader than styles

I hope this helps. I am attaching above cited paper.

Dr. Gurcharan Singh

Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Mob: 9810359089

https://www.gurcharanfamily.com/

[J.M. Garg]

Thanks a lot, Singh ji.

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With regards,
J.M.Garg