downloads/Killip 2.pdf - Passion Flowers

448 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX
within; petals oblong, slightly shorter and broader than the sepals,
bluish; corona filaments filiform, in about 6 series, the 2 outer 0.6
to 2 cm. long, purple(?), those of the succeeding series decreasing in
length from 4
to 2 mm. long; operculum membranous, 2 to 3 mm.
high, slightly plicate, bearing adnate to outer surface a row of filaments
about 5 to 7 mm. long and within a row of minute tubercles;
nectar ring a low ridge; limen tubular, closely surrounding base of
gynophore; ovary ellipsoidal, glabrous; fruit ovoid, the pericarp
coriaceous, yellowish.
TYPE LOCALITY: Gran Chaco, Argentina.
DISTRIBUTION: South-central Brazil, Paraguay, and northeastern
Argentina.
BRAZIL: Matto Grosso: Porto Esperanza, Rio Paraguay, Chase
11093 (B, N).
PARAGUAY: Pilcomayo River, Morong 1505 (Y). Asuncion,
Balansa 2202 (Bo, K).
ARGENTINA: Chaco: Gran Chaco, Gibert 43 (K, type). Chaco,
Fiebrig 1453 (B, Gen, K). Barranqueras, Meyer 2231 (N).
The detailed description of the floral parts here given is drawn
mainly from the excellently preserved specimens obtained by
Morong, Meyer, and Chase. In the structure of the operculum
P. Giberti differs slightly from Brown's diagnosis as "membranacea,
deflexa, integra." Doubtless Brown considered the row of filaments
attached to the operculum as part of the (faucial) corona. In the
Meyer specimen the principal corona filaments are less than half
as long as in Mrs. Chase's plant; however, as heretofore noted, there
is a good deal of difference in the length of these filaments in species
of Granadilla. Meyer notes that the color of the flowers is blue.
This is completely lost in drying.
The plicate operculum at once suggests a relationship with
P. kermesina, P. Eggersii, and P. Watsoniana, but the larger bracts,
borne close to apex of peduncles, indicate a different relationship.
Passiflora tucumanensis and P. naviculata, with which this species
might easily be confused, have glandless petioles and a quite different
flower structure.
279. Passiflora Eichleriana Mast, in Mart. Fl. Bras. 13, pt. 1:
616. pi. 128, /.
5. 1872.
Passiflora violacea f. albiflora Chod. & Hassl. Bull. Herb. Boiss.
II. 4: 63.1904.