Amphilophium buccinatorium (Cultivated- USA)

  
Mexico (as per WCSP 

Common names: Cross-vine, quarter-vine

Evergreen woody climber; leaves petioled, ending in branched tendril clinging by discs; leaflets 2, ovate to oblong, 5-15 cm long, entire, acute or acuminate; Flowers in 2-5-flowered cymes on short peduncle; corolla yellow-red, lighter inside, tubular, 5-6 cm long; capsule flat, 10-18 cm long; seeds laterally winged.


https://08511630493324166816.googlegroups.com/attach/45320634e34e9e2f/Trupet%20vine%203%20to%20ID%20%20may%2008%20128%20sm%20crp%20nm.jpg?part=0.3&view=1&vt=ANaJVrG3T6-fYzuSRQduuqAHYXQveQarPoBpK_HjdvuupYT6dmmarzTgZmZhRnCicGwxCxFvP67DUaGkz4cwTFHmeeccb4F3PWEqogrzpxw8Na1hm974GGQ
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https://08511630493324166816.googlegroups.com/attach/6d5c34764d599c7/Trumpet%20vine%202%20to%20id%20may%2008%20127%20sm%20crp%20name.jpg?part=0.2&view=1&vt=ANaJVrFxRrwjTUwnZ7cTf4-OfwQj7WEtGghWb9pxWbYs0CPrzn54vY6Jd9v9sPWBCUKiVTCheby7C0pquJn3T4JJz9CtiWh5UVuaCU1wNwZpxcKVmRSqFm0
Trumpet vine for ID 922011 UD 002: Please help me ID... classify this trumpet flower and its vine...
Its at the entrance of a nursery in Los Angeles...
they said the vine is at least more than 40 years old.  Hence the large thick stem, and bleached surface of the beautifully cracked bark... Date/Time-  summer 2008
Location- Place, Altitude, GPS-   sea level
Habitat- Garden/ Urban/ Wild/ Type-  garden grown
Plant Habit- Tree/ Shrub/ Climber/ Herb-   climber
Height/Length-   climbing over a trellis , yearly trimming...
Leaves Type/ Shape/ Size-  about 4 inches,   ovate
Inflorescence Type/ Size-   small bunch
Flowers Size/ Colour/ Calyx/ Bracts-    3 inches max , fused tube /trumpetlike

Fruits Type/ Shape/ Size Seeds-  not seed
Other Information like Fragrance, Pollinator, Uses etc.-  no data

I guess it is crossvine, Bignonia capreolata, and not a trumpet vine.
now come to look at fig 2 closely, i can see the third leaf developing into a tendril... originally did not see any tendrils... that was not correct. secondly, sorry donot have good enface  flower pic... but enlarging these in fig 1... I can see the 5 petals in the peculiar.. 1, 2,  2 arrangement, not exactly a perfect round... Your observation is exact...
I had photographed one in California. Yet to see it here, but being cultivated, should find it surely at some similar place.
Amphilophium buccinatorium as per another thread


https://08511630493324166816.googlegroups.com/attach/42524d982230fb73/Bignonia-capreolata-P1030206-California-1.jpg?part=0.1&view=1&vt=ANaJVrF3yF1trlSG3sRz8PBL0lB45f-jdf5PSomkclMOl59PJEiyt9vtWy2S_Qi6oHKdQNhELkk7dDHKbVIF05ScstA_kesqSBNkfxIu6A0QDYpylM65u1ohttps://08511630493324166816.googlegroups.com/attach/42524d982230fb73/Bignonia-capreolata-P1030209-California-3.jpg?part=0.3&view=1&vt=ANaJVrFRllYgXY3mf7NrFnlpMZLxrq7Vh8-vDpTUkjTCvUjunCQDxs_8AcppM8ecaf88vuz01E8ZnyN3Mxx0BHX6mfzwZk-HoaDQnZzqrIXE1X7G8weyIbU
https://08511630493324166816.googlegroups.com/attach/42524d982230fb73/Bignonia-capreolata-Sunnyvale-DSC04340-California-1.jpg?part=0.5&view=1&vt=ANaJVrE_6mQWX1k_KKxXdxSeF4GKmXSVcAUykZAFwB1e0GuLS7FB2RgqlVolwhmKCuOT392czsKGP0N3Lwe2hW7OzXj_YGeW1dAxrrCbrzfpDSshLqR7aoc
 
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Bignoniaceae Week: Bignonia capreolata from California: Bignonia capreolata L., Sp. pl. 2:624. 1753
Syn: Anisostichus capreolata (L.) Bureau; Doxantha capreolata Miers.
Common names: Cross-vine, quarter-vine
Evergreen woody climber; leaves petioled, ending in branched tendril clinging by discs; leaflets 2, ovate to oblong, 5-15 cm long, entire, acute or acuminate; Flowers in 2-5-flowered cymes on short peduncle; corolla yellow-red, lighter inside, tubular, 5-6 cm long; capsule flat, 10-18 cm long; seeds laterally winged.
Commonly grown here in California.
Was perhaps a wrong identification.
It is actually Amphilophium buccinatorium (Distictis buccinatoria). Bignonia capreolata has smaller flowers not exceeding 5 cm, this one has 10-14 cm long flowers

This is a vine with the scarlet orange flowers, look stunning in the afternoon southwestern sun in summer. This particular vine is old… at least 40 years, may be more… the trunk is wizened… in the original link. This was diagnosed back in September 2011 by ... efi thread
Yes ... Very common here in Sunnyvale, California.

yes, ..., they seem to have adapted this of several vines for their long season of flowering, gives color most of the year in that climate.
This should also go as Amphilophium buccinatorium (Distictis buccinatoria). Bignonia capreolata has smaller flowers not exceeding 5 cm, this one has 10-14 cm long flowers
  
 
 

References:

The Plant List Ver.1.1  WCSP  
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