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Mimosa quadrivalvis var. quadrivalvis

Mimosa quadrivalvis L. var. quadrivalvis

Fourvalve Mimosa

Fabaceae (Pea family)



USDA Native Status: L48 (N)

"Humifuse or weakly assurgent and herbaceous or, in tropical lowlands, sometimes softly frutescent and sarmentose, the subterete or prominently ribbed or sharply 4-5-angulate, internally pithy stems at anthesis 4-20 (-30) dm, either simple or randomly branched, the plant either fully glabrous, or glabrous except for weakly ciliolate stipules and leaflets, or finely densely puberulent and minutely reddish-granular, the stems, most leaf axes and some peduncles serially armed with widely recurved or declined stramineous aculei to 0.7-2.2 (-2.5) mm, the subconcolorous or distinctly discolorous leaflets most often glabrous facially but some near base of pinna-rachis often thinly pubemlent, or all dorsally strigulose-pilosulous, the globose capitula single and geminate in a long series of leaf axils, each on a peduncle shorter than the subtending Ieaf, sometimes pseudoracemose in young bud but early immersed in foliage." (bibref: 1811).


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Plant Characteristics

Duration: Perennial
Habit: Herb , Vine
Leaf Arrangement: Alternate
Leaf Complexity: Bipinnate
Leaf: "Stipules erect, narrowly lanceolate, linear-attenuate or setiform (1-) 1.5-9 x 0.2-0.7 mm, dorsally 1-nerved, persistent or becoming dry and fragile; leaf-stalks of longer leaves 2-17 cm, the petiole 1.5-11 cm, either shorter or longer than rachis, the longer interpinnal segments 6-28 (-35) mm, the ventral sulcus bridged between pinna-pairs and there charged with an ascending spicule 0.5-2.5 mm; pinnae of larger leaves 1-9 juga, not or little graduated, the rachis of longer ones 1-6 cm, the longer interfoliolar segments 0.8-2.5 mm; leaflet of longer pinnae 5-22 (-24) juga, a little decrescent proximally, the first pair 0.4-2 mm distant from ascending subulate paraphyllidia 0.1-0.6 (-1) mm, the blades linear, linear-oblong, -oblanceolate, or oblong-elliptic from obtusangulate base, at apex acute, obtuse mucronulate or sharply apiculate, those near midrachis 2.5-11 (-13) X 0.6-2.8 mm, 2.8-6 times as long as wide, all veinless or nearly so above, beneath 1-4 (-5)-nerved from pulvinule, the scarcely displaced midrib either simple or 1-4 (- 5)-branched near or above middle, the branches either simple or forked within the margin, the inner posterior (rarely also one weak anterior) primary nerve produced to or beyond mid-blade and anastomosing with a secondary nervule from midrib, the outer posterior nerve(s) short and simple, the venation imperceptible or almost so on upper face of blade, on lower face from pallid and sharply raised to discolored and immersed, sometimes almost imperceptible on both faces." (bibref: 1811).
Flower: "Peduncles at anthesis 0.4-13 (-20) cm, either prickly or not; capitula without filaments 4-11 mm diam., prior to anthesis moriform (the bracts exceptionally shortly emergent), the obtuse, greenish or purple-tinged flower buds glabrous; bracts submembranous, usually less than 1 mm; pedicels either obsolete or to 1 mm; flowers (4-) 5-6-merous, diplostemonous, most lower ones functionally staminate; calyx membranous, shortly campanulate 0.3-0.6 mm, the rim either undulate or minutely toothed, the teeth sometimes clavately dilated at tip; corolla turbinate to narrowly or subcampanulately vase-shaped (1.8-) 2- 4.3 mm, the ovate 1-nerved lobes 0.6-1.7 x 0.6- 0.85 mm; filaments pink or purplish-pink, sometimes fading whitish, united with corolla into a stemonozone 0.25-0.5 mm, exserted 2.5-9 (-10) mm." (bibref: 1811).
Fruit: "Pods (22-)30-60 x 3.5-5 mm, the replum 2.5-5 mm, aculeate with either straight or recurved, basally discrete prickles 2-4 mm, the valves 1.5 mm wide; seeds 8-30, basipetal, uniseriate and contiguous or shortly imbricate (then mutually flattened at overlapping ends), the testa brown, livid-brown or black, lustrous." (bibref: 1811).

Bloom Information

Bloom Color: White , Pink , Purple
Bloom Time: May , Jun , Jul , Aug , Sep
Bloom Notes: "Filaments pink or purplish-pink, sometimes fading whitish." (bibref: 1811).



Research Literature

Reslit 2886 - Legumes of the United States. IV. Mimosa (1971) Duane Isely

This information was provided by the Florida WIldflower Foundation.
Search More Titles in Research Literature

Additional resources

USDA: Find Mimosa quadrivalvis var. quadrivalvis in USDA Plants
FNA: Find Mimosa quadrivalvis var. quadrivalvis in the Flora of North America (if available)
Google: Search Google for Mimosa quadrivalvis var. quadrivalvis


Record Modified: 2020-12-07
Research By: JAM

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