Mimosa adenantheroides

  • Title

    Mimosa adenantheroides

  • Authors

    Rupert C. Barneby

  • Scientific Name

    Mimosa adenantheroides (M.Martens & Galeotti) Benth.

  • Description

    20. Mimosa adenantheroides (Martens & Galeotti) Bentham, London J. Bot. 5: 88. 1846. Acacia adenantheroides Martens & Galeotti, Bull. Acad. Roy. Sci. Bruxelles 10(9): 312 (=Enum. pl. Galeotti 10: 11). 1843.—"dans les montagnes calcaires et gneissiques de Sola et de Yolotepeque (cordillere au Sud d’Oaxaca), de 700 a 7500 pieds."—Holotypus, BR; isotypus, K! = NY photo s.n.!

    Acacia cylindriflora Martens & Galeotti, Bull. Acad. Roy. Sci. Bruxelles 10(9): 311 (=Enum. pl. Galeotti 10: 12.) 1843.—"No. 3207 . .. dans les ravins de Don Dominguillo, près d’Oaxaca, à 2,500 pieds."— Holotypus (Rudd, 1982: 138, fig. 2), BR! photo s.n., US!—Equated with the preceding by Grether, 1987: 310.

    Mimosa remota Bentham, London J. Bot. 5:88.1846. — "Mexico, Galeotti, n. 3240."—Holotypus not found at K in 1984-1986.—Equated with M. adenantheroides by Grether, 1987: 310.

    M. polyancistra Bentham, Trans. Linn. Soc. London 30: 422. 1875.—"New Spain, Pavon. .. ."—Holotypus, G-Boiss.!; phototypus, K!; clastotypus (fragm), misit Hochreutiner, 1926, NY!—Equated with M. adenantheroides by Grether, 1987: 310.

    M. hystricosa T. S. Brandegee, Univ. Calif. Publ. Bot. 4(3): 86. 1910.—"Collected on Cerro Gavilan and Cerro de la Yerba [Puebla, C. A. Purpus] No. 4242."— Holotypus, UC 1368031, isotypi, F! = F Neg. 54764, NY!—Equated with M. polyancistra by Britton & Rose, 1928: 163.

    M. gomezii Britton & Rose, N. Amer. Fl. 23(3): 159. 1928.—"Type from Valley of Oaxaca, September 20, 1894. [E. W.]Nelson 1479."—Holotypus, US!; clastotypus (fragm), NY!—Equated with M. adenantheroides by Grether, 1987: 310.

    Amply foliate, arborescent shrubs attaining 1- 4(-5) m, armed on intemodes and on some lf- stks with straight declined aculei 1—4.5 mm, or the lf-stks with recurved cat’s-claw ones, except for sometimes facially glabrous lfts minutely and often densely puberulent overall and livid-granular, the lfts strikingly bicolored, thin-textured, when dry dark green or dark brown above, pallid beneath, the inflorescence a leafy-bracteate or sometimes distally efoliate pseudoraceme of oblong-ellipsoid, spiciform (subracemose), cylindric, or even amentiform capitula. Stipules lanceolate, linear-setiform or -oblong 2-8 mm, 1- 2-nerved, often lanulose externally, becoming papery. Leaf-formula (ii—)iii—vi(—ix)/6—12, the lf-stks 3—12(—16) cm, the ventral groove bridged between pinna-pairs and there with a spicule 0.6-3 mm; rachis of longer pinnae (l-)2-6.5(-7) cm; lfts oblong or ovate-elliptic (the distal pair sometimes obovate), usually obtuse-mucronulate but sometimes apiculate, the larger ones 6.5-15 x 3-6 mm, 2-3(-3.7) times as long as wide, all slenderly 3—4-nerved dorsally, the midrib displaced to divide blade ±1:2, the inner posterior nerve brochidodrome well above mid-blade. Peduncles 1-4 per node, 1-3.5 cm; spikes relatively loose or early becoming so, without filaments 6.5-7.5 mm diam., the axis at full anthesis commonly 8-20 mm, exceptionally (in Sinaloa) to 6 cm, the pyriform fl-buds densely puberulent or silky-pilosulous, much longer than the small caducous bracts; pedicels 0-0.4 mm; flowers 5-merous 10-androus, all or almost all bisexual; calyx membranous campanulate 1.2-2.1 mm, the often unequal, deltate or depressed-deltate teeth 0.2-0.5 mm; corolla pinkish, narrowly vaseshaped 2.6-3.7 mm, the lobes shorter than tube, erect or in age arched outward; filaments whitish or pale pink, monadelphous through 0.2-0.5 mm below the puberulent ovary, exserted 5-7 mm. Pods to 10 per capitulum, in profile undulately linear, straight or gently decurved, when well fertilized 40-60 x 6-9 mm, 5-8-seeded, contracted at base into a stipelike neck ±3 mm, cuspidate at apex, the replum armed either distantly randomly or all around with gently recurved aculei 0.5-2 mm, the replum and valves alike densely puberulent and livid-granular overall, the papery valves low-bullate over the basipetal seeds, when ripe breaking up into free-falling, individually dehiscent articles ± 6-8 mm long.

    In pine-oak and tropical montane deciduous woodland, 1460-2400 m, discontinuously widespread in w. and s. Mexico, from Sinaloa (Sa. Surutato) to Jalisco, e. and s.-e. to centr. Veracruz, Oaxaca, and Chiapas. —Fl. (V-)VI-XI (-XII).