After about 15 years of buying seed collected in Ecuador labeled as Passiflora zamorana that always turned out to be Passiflora manicata, it looks like I finally got the true species! Fantastic! This is an extremely rare Tacsonia that has only been collected from two locations in Ecuador. As the long tube suggests, it is a powerful attractant to hummingbirds.
Will not tolerate hot climates where the temperature is routinely over 85 degrees, but will tolerate more heat if it doesn't last more than a couple of days. Plants that have been grafted to heat-tolerant rootstocks have reportedly done very well in hot climates. Afternoon shade is recommended. Will tolerate a slight frost.
Subgenus: Passifora, Supersection: Tacsonia. Photo courtesy of Jardin Jungle: jardinjungle.com.
Light: Full sun (in mild climates), part shade (particularly afternoon shade in warmer areas)
Soil: A wide range of soil, but it must be well-drained.
Fertilizer: A slow-release, bloom-booster type fertilizer is appreciated, but beware of using a fertilizer with too much nitrogen as it may push leaves at the expense of flowers.
Hardiness: Zone 9.