Dimerostemma goyazense (Gardner) M.D.Moraes
-
Authority
Moraes, M. D. & Semir, J. 2009. A revision of Brazilian
(Asteraceae, Heliantheae, Ecliptinae), with a new species and taxonomic adjustments. Brittonia. 61 (4): 341-365. -
Family
Asteraceae
-
Scientific Name
-
Description
Species Description - Coarse, robust subshrubs 1.5-2 m tall. Leaves opposite; petioles 4.5 cm long; blades 8-1 6 x 3-8.5 cm, submembranous, ovate, obtuse to rounded then shortly or very shortly attenuate at the base, acuminate at the apex, margins serrulate, adaxial surface sparsely scabridulous, the abaxial sparsely to densely strigillose or subtomentose, both surfaces with larger trichomes on veins. Outer phyllaries 8-20x2.5-6 mm, oblong to narrowly oblong or elliptic, slightly indurate at the base; inner phyllaries 5-8 x 2-5 mm, oblong-obovate, indurate at the base and more scarious. Paleae 7-8 x ca. 1.2 mm when folded, with subulate tip. Ray florets fertile, tube 1-1.5 mm, lamina 10.3-25x5-6 mm, oblong to elliptic or oblanceolate. Disc florets 4.5-6 mm long, lobes sparsely setulose abaxially. Cypselae 2.5-4.5x1.2-1.5 mm, the peripheral ones usually trigonous, awnless and wingless, the inner thickened, subquadrangular to slightly flattened, wingless or with wings up to 1mm wide; pappus mostly 1- awned, with the one awn, with the one awn on the opposite side of pale up to 2 mm long or awnless, crown 0.2 -1 mm high, partially fused to the body (less than 1/3) with laciniate to fimbroilate margins.
-
Discussion
Dimerostemma goyazense is similar to D. bahiense and D. apense, sharing leaves with the same shape and size (Fig. 1O-Q), but differs from both mainly in its pappus morphology being mostly 1-awned as opposed to two-awned in the other aspecies.