Centaurea dolopica (Asteraceae, Cardueae), a new species of section Acrocentron from Greece Author Zografidis, Aris Department of Biology, University of Patras, University Campus, GR 26504 Rion, Greece Author Koutroumpa, Konstantina 0000-0001-9391-874X Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Königin-Luise-Str. 6 - 8, 14195 Berlin, Germany k. koutroumpa @ bo. berlin; https: // orcid. org / 0000 - 0001 - 9391 - 874 X k.koutroumpa@bo.berlin Author Liveri, Eleni Department of Biology, University of Patras, University Campus, GR 26504 Rion, Greece & Department of Agriculture, University of Patras, GR 30200 Messolonghi, Greece Author Dimopoulos, Panayotis Department of Biology, University of Patras, University Campus, GR 26504 Rion, Greece text Phytotaxa 2023 2023-02-16 584 3 173 185 http://dx.doi.org/10.11646/phytotaxa.584.3.4 journal article 276847 10.11646/phytotaxa.584.3.4 51e9548a-d257-49f6-a33c-e34e5215ea6c 1179-3163 7645651

TABLE 2. Diagnostic morphological characters among the Centaurea achaia group. Measurements follow Routsi (1993).

	Centaurea dolopica	C. achaia	C. aetolica	C. corinthiaca	C. euboica
1 Only the branches that produce non-abortive, fertile capitula are accounted. 2 Only the non-abortive, fertile capitula are accounted. 3 Range of mean values and standard errors of 4 populations (Routsi 1993). 4 Range of mean values and standard errors of 2 populations (Routsi 1993).
Indumentum	Densely arachnoid (plants ± greyish)	Moderately arachnoid (plants ± green)	Densely arachnoid (plants ± greyish)	Moderately arachnoid (plants ± green)	Sparsely arachnoid (plants green)
Length of stems (cm)	40–100(–120)	30–60(–80)	30–70	20–50	30–70
Branches per stem1	1–11	(0–)1–6(–8)	1–9	0–6	(0–)1–5
Terminal leaflet	± Lanceolate	± Lanceolate	± Linear	± Lanceolate	± Narrowly oblanceolate
Capitula per stem2	3–29	1–12	2–20	1–10	1–10
Involucre (cm × cm)	1.8–2.6 × 0.9–1.5	2–3 × 1.6–2.8	2.3–2.7 × 1.6–2.2	1.9–2.4 × 1.2–1.5	2.1–2.9 × 1.9–2.9
Length of middle involucral bracts (cm)	0.8–1.8	1.8–4.5(–5.8)	1.4–2.5	1.7–3.4	1.3–3.2
Width of middle involucral bracts (cm)	0.3–0.5	(0.5–)0.6–0.8	(0.55–)0.65–0.7	(0.5–)0.55–0.65	(0.5–)0.55–0.75
Width of appendage of middle involucral bracts /Width of bract (mean ± st. error)	2.18 ± 0.07	1.93–2.28 ± 0.04–0.1	1.84 ± 0.09	1.41 ± 0.04	1.98–2 ± 0.04– 0.07
Length of middle involucral bracts/Length of appendage (mean ± st. error)	1.49 ± 0.03	1.11–1.19 ± 0.01–0.04	1.24 ± 0.02	1.22 ± 0.03	1.18–1.28 ± 0.04–0.07
Stripe of colored part of the appendage (incl. spine)	Brownish with darker veins, contrasting the cilia	Brownish with darker veins, contrasting the cilia	Whitish with indistinct veins, not contrasting the cilia	Brownish with darker veins, contrasting the cilia	Brownish with darker veins, contrasting the cilia
Spine of middle involucral bracts (cm)	0.1–0.8	0.9–3.2(–4.4)	0.3–1.2	0.9–2.2	0.4–2
Number of central florets	23–39	(43–)52–71(–88)	(54–)62–96	36–49(–52)	28–56
Corolla	Purplish	Purplish	Purplish	Whitish with orange veins	Purplish
Length of achenes of central florets in cm (mean ± st. error)	0.41–0.53 (0.47 ± 0.008)	0.5–0.6 (0.5–0.551 ± 0.001–0.014)3	0.42–0.46 (0.439 ± 0.006)	0.52–0.56 (0.529 ± 0.005)	0.5–0.55 (0.512–0.522 ± 0.008–0.009)4