Roldana spp.
Family: Asteraceae
Roldana image
Sue Carnahan  
Perennials or subshrubs [shrubs, or trees], [20-]60-100(-300)[-800] cm (caudices woody, fibrous-rooted, often woolly). Stems single or clustered, erect (glabrous or arachnose and glabrescent [tomentose to lanate]). Leaves mostly cauline (at flowering); alternate; petiolate; blades pinnati-palmately [pinnately or palmately] nerved, suborbiculate (proximal) to ovate or oblong (distal) [deltate, elliptic, lanceolate, orbiculate, or ovate], sinuately to angularly lobed (± polygonal) [palmately, pinnately, or not lobed], ultimate margins serrate to denticulate (lobes and denticles apiculate) or entire, abaxial faces glabrous or arachnose [tomentose to lanate] and glabrate, adaxial glabrous or glabrate [tomentose to lanate]. Heads radiate [disciform or discoid], in corymbiform or paniculiform arrays (peduncles usually arachnose). Calyculi 0 or of 1-3(-5)[-13+] (linear [filiform to foliaceous]) bractlets. Involucres campanulate [hemispheric to cylindric or funnelform], 3-5[-20+] mm diam. Phyllaries persistent, (5-)8-13+ in 2 series, erect, distinct, lanceolate or lance-linear to linear (± navicular), equal, margins ± scarious. Receptacles flat, alveolate (margins of sockets raggedly toothed), epaleate. Ray florets [0 or 3-]5-8, pistillate, fertile; corollas yellow or yellow-orange [whitish or ochroleucous] (laminae usually oblong to elliptic). Disc florets 6-30[-100+], bisexual, fertile; corollas yellow or yellow-orange [whitish or ochroleucous], tubes shorter to longer than funnelform to campanulate throats, lobes 5, recurved, deltate to lance-ovate; style branches: stigmatic areas continuous, apices rounded-truncate. Cypselae ± columnar, [5- or] 10-ribbed, puberulent (between ribs) [glabrous]; pappi persistent (fragile), of 40-80+, white, barbellulate bristles in 1 series. x = 30.
Species within Huachuca-Canelo