Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Leucanthemum

daisy
Habit Perennials, (10–)40–130(–200+) cm (rhizomatous, roots usually red-tipped).
Stems

usually 1, erect, simple or branched, glabrous or hairy (hairs basifixed).
Leaves

mostly basal or basal and cauline;

petiolate or sessile;

blades obovate to lanceolate or linear, often 1[–2+]-pinnately lobed or toothed, ultimate margins dentate or entire, faces glabrous or sparsely hairy.
Involucres

hemispheric or broader, 12–35+ mm diam.
Receptacles

convex, epaleate.
Ray florets

usually 13–34+, rarely 0, pistillate, fertile;

corollas white (drying pinkish), laminae ovate to linear.
Disc florets

120–200+, bisexual, fertile;

corollas yellow, tubes ± cylindric (proximally swollen, becoming spongy in fruit), throats campanulate, lobes 5, deltate (without resin sacs).
Phyllaries

persistent, 35–60+ in 3–4+ series, distinct, ovate or lance-ovate to oblanceolate, unequal, margins and apices (colorless or pale to dark brown) scarious (tips not notably dilated; abaxial faces glabrous or sparsely hairy).
Heads

usually radiate, rarely discoid, borne singly or in 2s or 3s.
Cypselae

± columnar to obovoid, ribs ± 10, faces glabrous (pericarps with myxogenic cells on ribs and resin sacs between ribs; embryo sac development monosporic);

pappi 0 (wall tissue of ray cypselae sometimes produced as coronas or auricles on some cypselae).
x

= 9.

Leucanthemum
Distribution
from USDA
mostly temperate Europe (some widely cultivated and sparingly adventive) [Introduced in North America]
[BONAP county map]
Discussion

Species 20–40+ (3 in the flora).

The three leucanthemums recognized here are weakly distinct and are sometimes included (with a dozen or more others) in a single, polymorphic Leucanthemum vulgare.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Blades of basal leaves usually pinnately lobed (lobes 3–7+) and/or irregularly toothed; margins of mid-stem leaves usually irregularly toothed proximally and distally
L. vulgare
1. Blades of basal leaves not lobed, usually toothed, rarely entire; margins of mid-stem leaves usually entire proximally, regularly serrate distally
→ 2
2. Blades of cauline leaves oblanceolate to lanceolate or linear, 50–120+ × 8–22+ mm; larger phyllaries 2–3 mm wide; ray cypselae 2–3(–4 mm), apices usually bare, rarely adaxially auriculate
L. maximum
2. Blades of cauline leaves elliptic to oblanceolate, 30–120+ × 12–25(–35+) mm; larger phyllaries 4–5 mm wide; ray cypselae 3–4 mm, apices usually adaxially auriculate.
L. lacustre
Source FNA vol. 19, p. 557. Author: John L. Strother.
Parent taxa Asteraceae > tribe Anthemideae
Subordinate taxa
L. lacustre, L. maximum, L. vulgare
Name authority Miller: Gard. Dict. Abr. ed. 4, vol. 2. (1754)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

The species comparison tool is brought to you by:
Northwest Wildflowers