downloads/Killip 2.pdf - Passion Flowers

4.
574 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX
united below the middle to form a tube, but they soon separate and,
together with the petals, stamens, and corona, fall off, leaving a very
small receptacle and the persistent gynophore, ovary, and styles,
the receptacle being little more than the slightly enlarged apex of
the pedicel.
The number of sepals and petals is uncertain. In both his generic
descriptions Masters says there are "4-5" of each, but he described
D. retusa and D. acuminata as having five of each. The drawing of
the flowers of D. retusa and D. Wallisii indicates that only four sepals
and four petals are present; no flowers of D. acuminata are shown in
the plate. Mr. N. Y. Sandwith, who has carefully examined the
specimens at Kew for me, writes that two flowers of the type of
D. retusa have five petals and apparently four sepals, and that the
flowers of D. acuminata are so badly mutilated that no decision is
possible. The well prepared specimens now in the United States
National Herbarium all have four sepals and four petals, the two
outer sepals being nearly twice as wide as the inner ones.
The difference in the description of the corona as given by
Masters and as presented above is largely a matter of definition of
the terms. (See the excellent drawing of Dilkea Johannesii var.
parvifolia Hoehne, Comm. Linh. Tel. Matto Grosso, Annexe 5, Bot.
pt. 5: pi. 111. 1915.)
Sepals not more than 1.5 cm. long; ovary subsessile (Peru).
Sepals 2 to 3 cm. long; ovary borne on a short gynophore.
1. D. parviflora.
Leaves cuneiform, truncate at the upper margin except for a
short lobe at the center (Peru and Brazil) 2. D. retusa.
Leaves ovate, ovate-oblong, or oblanceolate, rounded or acuminate
at apex.
Fruit ovoid, more than twice as long as wide (Brazil).
Fruit globose or spherical.
3. D. Johannesii.
Leaves oblanceolate or oblong-oblanceolate, more than 3
times longer than wide; sepals and petals 5 each(?);
fruit globose, about 6 cm. long (Brazil)
. D. acuminata.
Leaves variable, broadly ovate, ovate-oblong, or oblongoblanceolate,
usually less than 3 times longer than wide;
sepals and petals 4 each; fruit depressed-spherical, about
2.5 cm. long (Peru and Brazil) 5. D. Wallisii.