Nolina, MICHX

Hernández-Sandoval, Luis & Rebman, Jon P., 2018, The Genus Nolina (Asparagaceae) of the Baja California Peninsula, and the Recognition of a New Species Combination, Systematic Botany (Basel, Switzerland) 43 (3), pp. 717-733 : 718

NOLINA MICHX

Plants dioecious, arborescent or acaulescent plants with leaf rosettes at the apices of stems and branches. Leaves linear, flat or concave, green or glaucous green, with leaf margins microdenticulate or fibrous. Inflorescences a panicle with a scape and branches subtended by deltoid or triangular to linear bracts. Second order branches or branchlets subtended by triangular to linear papery bracts. Flowers campanulate, in fascicles or secondarily solitary, surrounded by laciniate or dentate membranaceous bracteoles; tepals 6 in two series, whitish, the midvein apparent, trichomes at the apex; staminate flowers with six stamens, anthers introrse, sagittate, ovary not developed and functioning as a nectary, tepals reflexed at maturity; pistillate flowers with a 3-carpelar ovary, rounded; stigmas sessile, 3-branched or 3-lobed; staminodes 6, septal nectaries present; ovules basal, two per carpel, sometimes subtended by a shelf-like or a small protruding structure. Fruits 3-lobed, dry, indehiscent, with an apical notch that bears the persistent stigmas; tepals persistent, all reflexed or at least the external ones. Seeds round, 1–2(–3) per fruit, in any case, one per locule or none if ovules abortive, exposed at maturity or not; testa smooth, microreticulate or reticulate, brown or gray.