Ray florets i, numerous, 2-several-seriate, the corolla consisting of a short tube and a flattened lamina lobed at apex (lamina sometimes reduced or lacking), the stamens none, the style slender, bifid at apex, the achene obovoid-trigonous, glabrous; disk florets e, numerous, the corolla consisting of a narrow tube and a campanulate 5-lobed limb, the stamens 5, glabrous, attached at the summit of the tube, the filaments slender, the anthers membranous, oblong, sagittate-auriculate at base, deltoid-appendiculate at apex, connate at margins, the style undivided, slender, distally swollen and papillose, surrounded at the base by a membranous sheath about 1 mm. long; paleae which subtend the florets usually membranous, concave, distally pilose.Shrubs or perennial herbs, often densely lanate, the caudex branching or simple, erect or subterranean; leaves alternate (rarely opposite), expanded at base to a coriaceous sheath, usually subentire, pinnate-veined; infloreseence axillary, corymbose-paniculate, spiciform- cymose, racemose, or simple, the branches usually alternate. subtended by bracts; heads pedunculate, the receptacle plane or con- vex, the involuere composed of numerous 1-several-seriate crowded imbricate phyllaries, the phyllaries subequal in length, the outer ones broadest. Ray florets i, numerous, 2-several-seriate, the corolla consisting of a short tube and a flattened lamina lobed at apex (lamina sometimes reduced or lacking), the stamens none, the style slender, bifid at apex, the achene obovoid-trigonous, glabrous; disk florets e, numerous, the corolla consisting of a narrow tube and a campanulate 5-lobed limb, the stamens 5, glabrous, attached at the summit of the tube, the filaments slender, the anthers membranous, oblong, sagittate-auriculate at base, deltoid-appendiculate at apex, connate at margins, the style undivided, slender, distally swollen and papillose, surrounded at the base by a membranous sheath about 1 mm. long; paleae which subtend the florets usually membranous, concave, distally pilose.Shrubs or perennial herbs, often densely lanate, the caudex branching or simple, erect or subterranean; leaves alternate (rarely opposite), expanded at base to a coriaceous sheath, usually subentire, pinnate-veined; infloreseence axillary, corymbose-paniculate, spiciform- cymose, racemose, or simple, the branches usually alternate. subtended by bracts; heads pedunculate, the receptacle plane or con- vex, the involuere composed of numerous 1-several-seriate crowded imbricate phyllaries, the phyllaries subequal in length, the outer ones broadest.General Information
Source: [
Brittonia Journal
General Information
