Symphyotrichum laurentianum (Fernald) G.L.Nesom


This taxon is accepted by Compositae
Notes: More details could be found in The Plant List v.1.1. Originally in The Plant List v.1.0

General Description

Annuals, 1–13+ cm. Stems 1, de­cum­bent to erect (straight), gla­brous. Leaves ± fleshy, margins entire, eciliate, apices obtuse, faces glabrous; basal deciduous at bolting, petiolate, blades oblanceolate 44–50 × 5–7 mm [cult.], bases attenuate; proximal cauline and some distal withering by flowering; cauline sessile, blades linear-lanceolate to spatulate, 15–55 × 1–4 mm, reduced distally, bases cuneate; distal sessile, blades linear-lanceolate to spatulate. Heads (disciform) in ± densely paniculiform arrays. Peduncles glabrous, bracts linear. Involucres campanulate, 5–8+mm. Phyllaries in 3–4 series, lanceolate, subequal, bases scarious, margins eciliate, green zones foliaceous (outer), apices obtuse, faces glabrous. Ray florets 0. Pistillate florets 14–47+ in 2–3+ series; laminae 0 (corolla tubes 2–2.4 mm, shorter than style branches). Disc florets 5–8+; corollas yellow, 3.1–3.9 mm, lobes deltate to triangular, 0.2–0.3 mm. Cypselae purple, obovoid, ± compressed, 2.8–2.9 mm, 2–4-nerved, faces strigillose; pappi white to yellowish white, 4.8–5.2 mm. 2n = 14.

 Information From

Compositae
CC0 1.0 Universal (CC0 1.0). https://creativecommons.org/publicdomain/zero/1.0
  • A CC0 1.0 Universal (CC0 1.0).
Flora of North America @ efloras.org
http://www.efloras.org/flora_page.aspx?flora_id=1
'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  • B Flora of North America Association
World Flora Online consortium
http://www.worldfloraonline.org/organisation/WFO
World Flora Online Data. 2018.
  • C CC0 1.0 Universal (CC0 1.0).