Commelina undulata

 
Commelina kurzii Clarke, J. Linn. Soc. Bot. 11: 444. 1874; Hook. f., Fl. Brit. India 6: 373. 1892; Fischer In: Gamble, Fl. Pres. Madras, 1075. 1928; Rolla Rao & Kammathy in JBNHS 59: 61, t. 1 (A & D) 1962;Type: India. C. longifolia Thw., Enum. Pl. Zeyl. 322. 1864; Rao & Verma, Bull. Bot. Surv. India 1974. Commelina erecta Linn., Sp. Pl. 41, 1753; Morton, In: J. Linn. Soc. Bot. 6: 183, 1967. Lakshminarsimhan in Sharma et al., Fl. Maharashtra (Monocot.) 151, 1996. C. paludosa Blume var. mathewii (C. B. Clarke) R. S. Rao & Kammathy In: Bull. Bot. Surv. India 3: 168. (1961) 1962. as per efi thread.
 
Common name: Long Leaved Dayflower • Sanskrit: जलपिप्पलियांगुली Jalapippalianguli; 
 
 

 
 
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Commelinales and Zingiberales Week: UNID Commelinaceae from KAAS Satara Maharashtra Sept2009:  Please bear with its little larger size,
Place: Near School; enroute Kass Plateau, Satara Maharashtra,
Date: 25th September, 2009(morning: 9.15am)
https://groups.google.com/group/indiantreepix/attach/f674f23c4e66e2ba/C.%20kurzii.jpg?part=0.1&authuser=0&view=1
 
- with the help of aggregate spathe character I can say this must be  
Commelina kurzii Clarke, J. Linn. Soc. Bot. 11: 444. 1874; Hook. f., Fl. Brit. India 6: 373. 1892; Fischer In: Gamble, Fl. Pres. Madras, 1075. 1928; Rolla Rao & Kammathy in JBNHS 59: 61, t. 1 (A & D) 1962;Type:  India. C. longifolia Thw., Enum. Pl. Zeyl. 322. 1864; Rao & Verma, Bull. Bot. Surv. India 1974. Commelina erecta Linn., Sp. Pl. 41, 1753; Morton, In: J. Linn. Soc. Bot. 6: 183, 1967. Lakshminarsimhan in Sharma et al., Fl. Maharashtra (Monocot.) 151, 1996. C. paludosa Blume var. mathewii (C. B. Clarke) R. S. Rao & Kammathy In: Bull. Bot. Surv. India 3: 168. (1961) 1962. 
Herbs perennial. Stems erect or ascending, diffuse, numerous branched, to 60 cm, glabrous. Leaves sessile; leaf sheath usually ciliate; leaf blade lanceolate, 6--9 × 1.2--2.8 cm, glabrous or ± hirsute on both surfaces. Involucral bracts 2--4, in fascicles at apex of branches and opposite smaller leaves, sessile, funnelform, 2--2.5 cm, glabrous or somewhat hirsute, proximal margins partly connate (2--3 mm free), apex falcate-acuminate. Proximal branch of cincinni often abortive, sometimes with c. 2 cm long peduncle but without flowers, distal branch with peduncle to 1 cm and with several flowers; pedicels twisting. Sepals 3.5--4 mm, membranous, boat shaped. Paired petals pinkish blue (?) to 1 cm, odd petal membranous to 3 mm. Fertile stamens 3; staminodes 3, anthrode cruciform. Capsule subglobose, 3--4 mm, 2-3 locular, sometimes only single locule containing seed and dehiscent; posterior locule indehiscent. Seeds one per locule, brownish-black to grey, smooth with white farinose, a lighter brown concolorous material around the periphery, oblong, c. 4 mm, flat on one surface; hilum linear, curved embryotega lateral.
Flowering and fruiting: October to January.
Distribution: Commelina kurzii is common in tropical Oceania, but scattered in Asiatic countries like India, Indonesia, Philippines, etc.
Ecology: Humid Mountain slopes
Note:It varies widely, with plants erect or diffuse, glabrous or hairy, and capsule (1 or) 2- or 3-locular. The species is characterized by having apically falcate-acuminate involucral bracts only partly connate at the proximal margins, arising opposite the fascicled smaller leaves, and therefore resembling compound heads.Another thing is petal colour, in earlier relevant literature it described as pink, violet, lavender, etc. but species which I collected from few location is with white petals. There is no range in their colour, so it need to study meticulous.
 
 
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https://groups.google.com/group/indiantreepix/attach/b14111a84ea48dd4/Commeliniaceae%20(3).jpg?part=0.2&authuser=0&view=1
Commelinaceae for identification 290812MK02:
Please help me to identify this herb found in moist soil in Western Ghats.
Date: 28 Jul 2012
Place: Valparai
Locale: near foot path and moist place
Alt.: 930 m asl
it may Commelina kurzii
Many thanks …
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Commelina species for ID : 9 posts by 5 authors. 16 inserted images.
Commelina maculata OR Commelina undulata
Roadside, Surat Gujarat , 01 08 2019 morning. 
Hope, material is sufficient to reach a conclusion. 
For identification of species, I primarily rely on FOI and EFI. Google is helpful too, so are online flora, but not by much. 
In this case I am torn between two I mentioned in heading. Anticipating a quick resolution with salient key points. 
Hairs are negligible, not on leaf , neither on leaf-sheath or spathe.
Petals are nearly 1 cm in diameter, third petal tiny and transparent, so are sepals. 
Takes root at nodes, spreads on ground, terminal part of branches come upward nearly 25-30 cm, but I have seen going much higher when crowded.
Takes root at nodes, spreads on ground, terminal part of branches come upward nearly 25-30 cm, but I have seen going much higher when crowded.
Here is a photo of a young plant, take four years ago.

Thanks a lot, ..., for superb details and presentation, hardly seen before. 
I guess C. undulata.  Images could not be enlarged to view properly.
Thank You, Sir ! But please help by pointing out characters in favor and against. Also I need some help on Image resizing ......… I have tried all tricks but I keep loosing details after resizing below 150 Kb and zooming in. 
great study in photographs. i hope newer members would learn from these
You are quite right, it appears to be Commelina undulata (Syn. Commelina kurzii) before to confirm you please see whether the dorsal locule of the capsule is muricate (see picture below ).  

https://groups.google.com/group/indiantreepix/attach/54acc1378d78e/IMG_20190822_084335.jpg?part=0.18&view=1&authuser=0
For your kind attention, …
6 images.
Seems to Commelina undulata R.Br. 



 
 
References:
A Revised Handbook of the Flora of Ceylon -, Volume 14 edited by M. D. Dassanayake (2000)- p.193 (Commelina kurzii Clarke)
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