Mimosa strobiliflora Buckart
-
Authors
Rupert C. Barneby
-
Authority
Barneby, Rupert C. 1991. Sensitivae Censitae. A description of the genus Mimosa Linnaeus (Mimosaceae) in the New World. Mem. New York Bot. Gard. 65: 1-835.
-
Family
Mimosaceae
-
Scientific Name
-
Type
161. Mimosa strobiliflora Burkart, Darwiniana 7(4): 519, fig. 3. 1947.—"Brasil. Estado Paraná: Porto Amazonas, ad ripam flum. Rio Iguassu, leg. P. Dusen No. 15.157, 10.VI. 1914."-Holotypus, S!; isotypi, BM! F! GH! MICH! NY! S (3 sheets)!
-
Description
Species Description - Unarmed shrubs of unknown stature, glabrous except for residually ciliolate stipules, ventrally puberulent pinna-rachises and ciliolate floral bracts, the terete, lustrously glutinous purplish-brown, paniculately branched homotinous stems together with olivaceous concolorous thick-textured lfts and axillary peduncles all densely charged overall with impressed or immersed resin-exuding glands, the subglobose capitula involucrate by dilated bracts. Stipules erect or in age declined, foliaceous, broadly ovate-subcordate or semicircular, obtuse or subapiculate, ±2.5 mm long and wide, persistent. Leaf-stalks (3-)4-7 cm, the petiole 10-32 x 0.5-0.8 mm, the interpinnal segments 7-14 mm, the shallow narrow ventral sulcus obscurely bridged between pinnae but espiculate; pinnae (2-)3-5-jug., a little accrescent distally, the rachis of furthest pair 2.5-4 cm, the longer interfoliolar segments 1.8-2.5 mm; lfts of longer pinnae 12-15-jug., decidedly alternate or in some lvs subopposite along rachis, the first 1ft ±0.5 mm distant from broadly ovate-subcordate paraphyllidia 0.4-0.9 mm, the blades oblong-obovate or -elliptic from semicordate base, obtuse or subtruncate at apex, the longer ones 4-8 x 1.8-3.8 mm, 2.1-2.4 times as long as wide, the margin distally crenulate by impressed glands, the dorsal face faintly 1-4-nerved from pulvinule, the midrib subcentric, all nerves discolored but fully immersed. Peduncles solitary and geminate toward the end of leafy branchlets, 2.5-4.2 cm; capitula without filaments 8-9.5 mm diam., prior to anthesis conelike, the 2-3 outermost bracts not subtending a fl, subfoliaceous and ±4 mm long and as wide or wider, bluntly 2-3-lobed; interfloral bracts oblanceolate obtuse 3.5-5 x 0.9-1.3 mm, finely ciliolate with white hairs ±0.5 mm, persistent; flowers 4-merous 8-androus, mostly bisexual; calyx campanulate glabrous 0.5-0.6 mm, the rim obscurely lobulate; corolla funnelform 3.5-4 mm, the membranous, shallowly concave, 1-or obscurely 3-nerved lobes ±1 x 0.75 mm, externally puberulent and glandular-setulose; filaments presumably pink, free essentially to base, exserted ±4.5 mm; ovary glandular; pod unknown.
Distribution and Ecology - In unrecorded microhabitat near 750 m, known only from banks of upper rio Iguaçú at ±49°50'W in s.-e. Paraná, Brazil. —Fl. VI-VII(-?).
-
Discussion
A remarkable mimosa, resembling M. paraguariae in habit and M. bifurca in glutinous foliage and alternate leaflets, but strikingly different from both in conelike capitula involucrate by two or more broad, bluntly toothed subfoliaceous bracts.
-
Distribution
Brazil South America| Paraná Brazil South America|