Asimina reticulata
Asimina
flag-pawpaw, netted pawpaw
pawpaw
thin, cracking longitudinally (shallowly furrowed in larger trees of Asimina triloba).
red-brown to tan, distally red or pale-hairy, becoming gray-brown, distally glabrous or sparsely pale-hairy.
secondary branching sparse to copious, 2-ranked;
primary shoots of shrubs usually several, erect to arching or decumbent;
lenticels scattered, small, prominent;
buds naked.
blade oblong to elliptic or narrowly obovate, 5-8 cm, leathery, base abruptly and broadly cuneate or rounded, margins strongly to moderately revolute, apex acute to broadly rounded, occasionally notched;
surfaces abaxially densely orange-hairy, becoming sparsely so on veins, adaxially sparsely orange-hairy, becoming glabrous and often glaucous.
blade membranous or leathery, glabrous to variously hairy.
on previous year's growth;
peduncle slender, 2-3.5 cm, tomentose;
bracteoles 1-2, basal, usually ovate-triangular, rarely more than 2-3 mm, hairy.
axillary, on new shoots or from above leaf scars of previous seasons, fascicles;
peduncle bracteate or bracteolate.
1-3 per node, fragrant, large;
sepals triangular, 8-10 mm, abaxially orange-puberulent;
outer petals spreading, white or cream, narrowly oblong to obovate, 2.5-6 cm, abaxially puberulent on veins;
inner petals incurved, white, yellowish white, rarely pink or cherry red, mostly with deep maroon to purple corrugate zone, lance-hastate, 1/3-1/2 length of outer petals, fleshier, base saccate, margins revolute;
pistils 3-8.
1-4 per leaf axil, nodding to nearly erect, becoming enlarged;
receptacle convex to ±globose or elongate, elevated;
sepals deciduous, 3(-4), nearly distinct, triangular to deltate-ovate, valvate in bud;
petals in 2 unequal whorls, each of 3-4 equal members, with prominent veins, imbricate in bud, those of outer whorl larger, thinner than those of inner whorl;
nectaries present, usually with differently pigmented, thickened-corrugate zones adaxially near petal bases;
stamens very numerous, short-columnar, forming ball;
filament short;
connective blunt to nearly spheric or cuboid;
pistils 2-8(-12), sessile to stipitate, distinct, glabrate;
ovules several (sometimes few) in 2 staggered rows.
simple berries, usually 3-5 per flower, spreading from swollen receptacles, unevenly oblong-cylindric, pulpy.
yellow-green, 4-7 cm.
dark to pale brown, lustrous, 1-2 cm.
3-many per pistil, bean-shaped, slightly compressed laterally, coat tough, margins absent.
=9.
=18.
Asimina reticulata
Asimina
Asimina reticulata hybridizes with A. incana and A. pygmaea. Hybrids with the latter frequently have cherry-red inner petals.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species 8 (8 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaf blade commonly membranous, oblong-obovate to oblanceolate, apex acute to acuminate; flowers maroon, rarely yellow, fetid, from previous year's shoots before or during new leaf emergence; inner petals with saccate base. | → 2 |
1. Leaf blade commonly leathery, linear to obovate, apex acute to broadly rounded or notched; flowers white or yellow-white to red or maroon, fetid or sweet-smelling, from previous year's growth or from new shoots. | → 3 |
2. Flowers 2-4(-5) cm diam.; peduncle 1 cm or more at anthesis, hairs dark brown to red-brown; corrugate zone of inner petals distinct. | A. triloba |
2. Flowers 1-1.7 cm diam.; peduncle less than 1 cm at anthesis, hairs red-brown to tan; corrugate zone of inner petals indistinct or absent. | A. parviflora |
3. Flowers from nodes of previous year's growth, emerging before or with leaves; leaf blade elliptic or oblong, obovate or cuneate, never linear, lance-linear, or oblanceolate; flowers large, sweetly fragrant. | → 4 |
3. Flowers from shoots of current year's growth, emerging after leaves are expanding or full-size, either axillary to new leaves or terminal on short shoots; leaf blade linear to narrowly obovate or spatulate; flowers large to small, fragrant or fetid. | → 5 |
4. Abaxial and adaxial surfaces of young leaf blade densely tomentose, hairs pale blond or tan; fully emerged leaf blade oblong to obovate, margins obscurely revolute, inner petals yellow-white with deep yellow corrugate nectary zone. | A. incana |
4. Abaxial surface of young leaf blade densely orange-hairy, adaxial surface sparsely orange-hairy; fully emerged leaf blade narrowly obovate to oblong or elliptic, margins strongly to moderately revolute; inner petals white or yellowish white, rarely pink or cherry red, mostly with deep maroon to purple corrugate zone. | A. reticulata |
5. New shoots, petiole, abaxial surface of leaf blade along veins, and peduncle with dense, bright red hairs; new growth with flowers (buds) terminal. | A. obovata |
5. New shoots, petiole, abaxial surface of leaf blade, and peduncle glabrous to sparsely hairy; new growth with flowers axillary to new leaves. | → 6 |
6. Mature shrubs seldom more than 0.5m, shoots decumbent to arching; perianth maroon to red, outer petals 1.5-3 cm. | A. pygmaea |
6. Mature shrubs seldom less than 1m, shoots erect to nearly erect; perianth white to red or maroon, outer petals 2-8 cm. | → 7 |
7. Leaf blade oblong-oblanceolate to broadly spatulate; expanded flowers reddish, fetid; outer petals 2-2.5 cm; perianth 3-4-merous; Florida. | A. tetramera |
7. Leaf blade linear, linear-elliptic, linear-oblanceolate, or narrowly spatulate; expanded flowers mostly with outer petals white or cream and inner petals red or white, sweet-smelling; outer petals 3-8 cm; perianth mostly 3-merous; nFlorida, Georgia, Alabama. | A. longifolia |
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