Thunbergia species

 
Thunbergia battiscombei or a Thunbergia erecta; Edakkal caves, Kerala, Hill region, Aug 2008;  ID request - wild climber from Uttarakhand (220609SS1) - indiantreepix | Google Groups Purple flower for ID - indiantreepix | Google Groups

 
 
https://08511630493324166816.googlegroups.com/attach/73b32a867e74ac25/raanjaaileaves.jpg?part=0.3&view=1&vt=ANaJVrGjz4knKAPqgdyTmnVVnJLPVHv77UivmcT5rsJRjIsdEXPqAJWW-tyKqehexKfg6d150ypyY9vzXlpFcOx6hA_KMB9KDgMNeJ4nrs9pWPgafaDYd4c
https://08511630493324166816.googlegroups.com/attach/73b32a867e74ac25/Raanjaai.jpg?part=0.2&view=1&vt=ANaJVrEp9n7I6jtprkWUH_kR38PRuu6RBbwn5NTWc2MLZPmzS_LkIvpX2imK4uYYtwibilBs39gD9WY6fuiRntz6VcnF3aSF3BEnhlFKwVRL2H0HdN5opSk
https://08511630493324166816.googlegroups.com/attach/73b32a867e74ac25/raanjaaileaves_1.jpg?part=0.1&view=1&vt=ANaJVrEaEVFdE39NbtorkkDz9e3qFhzhjompQGlJe6VMDdDiLUSzhTpSFnrJdQC61xhEopXKQmC-RK36oxdfAci_h2NuTKdaYoen1G2833PVTXq_0wqRNL0
design on leaves: This RaanJaai creeper in my garden. I have noted that there appears some design on the leaves and was wondering what is it due to ? I have also posted the picture of its flower. It has no fragrance. The creeper grows very rapidly.
Looks like damage by leaf mining insects. The vast majority of leaf-mining insects are moths (Lepidoptera), sawflies (Symphyta) and flies (Diptera), though some beetles and wasps also exhibit this behavior.
Yes, some insects cause such markings on leaves of plants. Though I have no idea which insect causes it.
There is a larva inside below the epidermal layer eating while moving and making tunnels :).
Never saw it coming out.
There is an insect larvae living below epidermis and it travels inside eating and making tunnels :P... Those lines are actually its path.

Flowers look like Thunbergia fragrans and as it is scentless, so it matches with sweet clock vine but leaves look different. So m nt so sure.
the Larvae of Agromyzidae, also known as leaf-miner flies (minierfliege in german) is responsible for making these "designs".
http://en.wikipedia.org/wiki/Agromyzidae
I have a few fotos of some beautiful designs, will upload, when i have more time. I normally pluck the leaves and burn them or throw them away, not on kompost.
Till then watch some here:
http://www.google.de/search?q=minierfliege&hl=de&client=firefox-a&hs=QBI&rls=org.mozilla:de:official&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=jR2wTpmWJIj3sgbJveFk&ved=0CDoQsAQ&biw=1280&bih=793&sei=%20kR2wTrbdHc-OswaNu51F
After going through the links I understood that these larvae live a protected life within the tissues of the leaf and also at the following http://en.wikipedia.org/wiki/Leaf_miner that
The precise pattern formed by the feeding tunnel is very often diagnostic for which kind of insect is responsible, sometimes even to genus level. Interesting how Nature is!!