Excerpts from Jim Conrad's
Naturalist Newsletter

from the February 21,  2010 Newsletter issued from Hacienda Chichen Resort beside Chichén Itzá Ruins, central Yucatán, MÉXICO
PASSION FRUIT

For months I've been eating passion fruits off the vines of a nearby stone wall densely overgrown with passionflower vines -- genus Passiflora of the Passion-Flower Family. You can see one of the fruits hanging next to a typical three-lobed leaf below:

Yellow Passion Fruit, PASSIFLORA EDULIS var. FLAVICARPA

Though many species of Passionflower exist and many cultivars are grown for their edible fruits, I'm guessing that our vines are PASSIFLORA EDULIS var. FLAVICARPA. Passiflora edulis has a purple-fruited variety and a yellow-fruited one, and the picture shows the latter, with the fruit just beginning to ripen.

Yellow Passion Fruit, PASSIFLORA EDULIS var. FLAVICARPA, open fruit

Above the fruit has been cut open to reveal its many semi-hard seeds embedded in their pulpy arils. The aril in passion fruits is the outer covering of the seed, and it arises from the seed's hilum or funiculus. The funiculus is the "umbilical cord" connecting the fruit wall with the seed. You can see macaroni-like funiculi in the picture appearing as stalks arising from the fruit's inside wall. A seed's hilum is the scar or mark indicating the point of attachment of the seed with its funiculus. In the US we often run into fruiting Hearts-a-bustin', genus Euonymus, in which the seeds are enclosed in orange-colored aril that attract birds to come eat the seeds and transport them to parts unknown.

Another distinguishing feature of passion fruits is the tough stem affixed at the fruit's base. That stem is what becomes of the stalk upon which a passion flower's ovary perches inside the flower. You can clearly see the ovary's stalk (known as the gynophore) in the second and third pictures on our Passion-Flower page at http://www.backyardnature.net/fl_passn.htm.

Passion fruits are good to eat, though our yellow variety is a bit tart to eat without adding lots of sweetening. A delicious drink is made by blending the fruit pulp with ice, water, sugar, and a pinch of bicarbonate of soda. The juice is an excellent source of Vitamin C.


from the May 9, 2010 Newsletter issued from Hacienda Chichen Resort beside Chichén Itzá Ruins, central Yucatán, MÉXICO
YELLOW PASSION-FRUIT FLOWERING

In last February's Newsletter we met our fruiting Yellow Passion Fruit vines, shown above. Now those same vines are flowering, gorgeously so. You can see a three-inch-across (7.5 cm) blossom  below.

(By the way, passionflower blossoms display some unusual anatomy. You might enjoy figuring out what the various parts are of the blossom in the above picture by referring to my Passionflower page, with parts labeled, at http://www.backyardnature.net/fl_passn.htm.)

PASSIFLORA EDULIS var. FLAVICARPA, flower


from the May 7, 2017 Newsletter issued from Rancho Regensis north of Valladolid, Yucatán, MÉXICO
NECTAR ROBBERY OF PASSION FLOWERS

Nowadays a passionflower vine here at the ranch is loaded with blossoms, a close-up of the complex and beautiful center of one flower being shown below:

PASSIFLORA EDULIS, stigma and stamens

Many of our vine's flowers are damaged. Below, you can see one not yet expanded, but with one side completely ripped away, one of the pistil's three stigma arms broken off, several stamens missing and others mangled, and an entire sepal gone:

PASSIFLORA EDULIS, flower after nectar robbery

This damage was caused by an animal robbing the flower's nectar, so who was the robber? My guess is that it was a bat, a rodent, or a bird and, if a bird, maybe an Altamira Oriole or Golden-fronted Woodpecker, both frequently seen here ravaging fruits such as oranges and bananas.