Monographs Details:
Authority:
Luteyn, James L., et al. 1995. Ericaceae, Part II. The Superior-Ovaried Genera (Monotropoideae, Pyroloideae, Rhododendroideae, and Vaccinioideae P.P.). Fl. Neotrop. Monogr. 66: 560. (Published by NYBG Press)
Luteyn, James L., et al. 1995. Ericaceae, Part II. The Superior-Ovaried Genera (Monotropoideae, Pyroloideae, Rhododendroideae, and Vaccinioideae P.P.). Fl. Neotrop. Monogr. 66: 560. (Published by NYBG Press)
Family:
Ericaceae
Ericaceae
Synonyms:
Ledothamnus guyanensis var. minor Oliv., Ledothamnus sessiliflorus var. glaber N.E.Br., Ledothamnus tatei A.C.Sm., Ledothamnus guyanensis subsp. tatei (A.C.Sm.) Maguire, Steyerm. & Luteyn, Ledothamnus guyanensis var. nitidus A.C.Sm., Ledothamnus tatei var. puberulus A.C.Sm., Ledothamnus steyermarkii subsp. steyermarkii var. puberulus (A.C.Sm.) Maguire, Steyerm. & Luteyn, Ledothamnus steyermarkii A.C.Sm., Ledothamnus steyermarkii subsp. longisetus Maguire, Steyerm. & Luteyn, Ledothamnus stenopetalus Maguire, Steyerm. & Luteyn
Ledothamnus guyanensis var. minor Oliv., Ledothamnus sessiliflorus var. glaber N.E.Br., Ledothamnus tatei A.C.Sm., Ledothamnus guyanensis subsp. tatei (A.C.Sm.) Maguire, Steyerm. & Luteyn, Ledothamnus guyanensis var. nitidus A.C.Sm., Ledothamnus tatei var. puberulus A.C.Sm., Ledothamnus steyermarkii subsp. steyermarkii var. puberulus (A.C.Sm.) Maguire, Steyerm. & Luteyn, Ledothamnus steyermarkii A.C.Sm., Ledothamnus steyermarkii subsp. longisetus Maguire, Steyerm. & Luteyn, Ledothamnus stenopetalus Maguire, Steyerm. & Luteyn
Description:
Species Description - Wiry, rhizomatous shrublet to 3(-8) dm tall; mature stems often gnarled, terete to subterete, striate to ribbed, glabrous; bark cracking longitudinally; twigs subterete, glabrous or puberulent. Leaves in whorls of 3-4, strongly imbricate, ascending to strongly diverging from the stem, linear-oblong, ± trigonous in cross-section, 3-6 × 0.8-1.2 mm, base broadly cuneate and decurrent, apex acute, keeled (short-mucronate), apparent margins glabrous or ciliate and then also bearing short, translucent, eglandular, acicular hairs to 0.2 mm long, glabrate; petiole 0.5-1.2 mm long, glabrous or puberulent (Fig. 21-J). Inflorescence terminal, flowers solitary; pedicel subterete, ca. 1.5-3 mm long, densely puberulent, also densely long-setose with translucent, eglandular hairs to 1.7 mm long; floral bract and bracteoles flat to concave above, ovate, 4-6 mm long, pubescent as leaves. Flowers 6-8-merous; calyx campanulate, (6-)7-11 mm long, puberulent, lobes spreading, ovate, 6.5-10 mm long, acuminate, similar in pubescence to leaves; petals wide-spreading (corolla rotate), oblong-elliptic, 11-18 × 5-7 mm, rounded to obtuse, scarlet when fresh, glabrous; stamens ca. 11 mm long; filaments 8-9 mm long; anthers 3-4 mm long; ovary glabrous; style (2-)3-4 mm long, glabrous. Capsule oblong, 4-5 mm long.
Species Description - Wiry, rhizomatous shrublet to 3(-8) dm tall; mature stems often gnarled, terete to subterete, striate to ribbed, glabrous; bark cracking longitudinally; twigs subterete, glabrous or puberulent. Leaves in whorls of 3-4, strongly imbricate, ascending to strongly diverging from the stem, linear-oblong, ± trigonous in cross-section, 3-6 × 0.8-1.2 mm, base broadly cuneate and decurrent, apex acute, keeled (short-mucronate), apparent margins glabrous or ciliate and then also bearing short, translucent, eglandular, acicular hairs to 0.2 mm long, glabrate; petiole 0.5-1.2 mm long, glabrous or puberulent (Fig. 21-J). Inflorescence terminal, flowers solitary; pedicel subterete, ca. 1.5-3 mm long, densely puberulent, also densely long-setose with translucent, eglandular hairs to 1.7 mm long; floral bract and bracteoles flat to concave above, ovate, 4-6 mm long, pubescent as leaves. Flowers 6-8-merous; calyx campanulate, (6-)7-11 mm long, puberulent, lobes spreading, ovate, 6.5-10 mm long, acuminate, similar in pubescence to leaves; petals wide-spreading (corolla rotate), oblong-elliptic, 11-18 × 5-7 mm, rounded to obtuse, scarlet when fresh, glabrous; stamens ca. 11 mm long; filaments 8-9 mm long; anthers 3-4 mm long; ovary glabrous; style (2-)3-4 mm long, glabrous. Capsule oblong, 4-5 mm long.
Discussion:
Ledothamnus sessiliflorus is characterized by small stature, ± gnarled stems with eglandular pubescence, acicular hairs of leaf and sepal margins, pedicels short and setose, and large, terminal flowers with scarlet petals. Its relationships to L. jauaensis are discussed with that species.
Ledothamnus sessiliflorus is characterized by small stature, ± gnarled stems with eglandular pubescence, acicular hairs of leaf and sepal margins, pedicels short and setose, and large, terminal flowers with scarlet petals. Its relationships to L. jauaensis are discussed with that species.
Distribution:
Venezuela South America| Bolívar Venezuela South America|
Venezuela South America| Bolívar Venezuela South America|
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