Anthemis rigida subsp. rigida Boiss. ex Heldr.

Goula, Katerina & Constantinidis, Theophanis, 2021, Taxonomic diversity and karyology of Anthemis rigida (Anthemideae, Asteraceae) in the Aegean, Greece, Phytotaxa 484 (1), pp. 129-143 : 140-141

Anthemis rigida subsp. rigida Boiss. ex Heldr. ( Fig. 5 : a,b)

Type (lectotype designated by Greuter 1968):― CYPRUS. Sibthorp & Lindley, Flora Graeca t. 853 .

Annual with prostrate to ascending, simple or sparingly branched stems. Stems and leaves more or less tomentose with medifixed hairs. Lower leaves 1−5 cm, pinnatisect with pinnatifid to pinnatisect segments, ovate-oblong in outline; ultimate lobes obovate to oblanceolate, 0.5–1 mm wide, subobtuse, acute or mucronate; upper leaves similar but smaller. Peduncles thickened, becoming rigid and usually recurved in fruit. Capitula solitary, discoid. Involucre 3.5−6(−8) × 2.5−4.5 mm, ocbonical to subcylindrical, bracts imbricate, subequal in length, more or less tomentose when young, thick and rigid in fruit. Outer involucral bracts oblong-lanceolate to ovate-lanceolate, with scarious margins up to 0.2 mm. Inner involucral bracts narrowly ovate- to obovate-lanceolate, with scarious margin 0.2−0.5 mm. Disc florets 1.8−3 mm, yellow, the peripheral sometimes tinged with red. Receptacular scales hyaline, oblanceolate, acute. Achenes obconical, faintly ribbed; outer achenes 1.5−2.1 × 0.7−1 mm, with a corona 0.3−0.9 mm; inner achenes 1.6−2.3 × 0.5−0.9(−1) mm, with a corona (0.1−) 0.2−0.5 mm.

Distribution and habitat:―See Strid (2016a,b, map 413).

Figures

FIGURE 5. Photographs of Anthemis rigida in the field (a, c, e, g) and in cultivation (b, d, f, h): A. rigida subsp. rigida from Kriti (a & b); A. rigida subsp. liguliflora from Kithira (c & d); A. rigida subsp. runemarkii from Milos (e & f); A. rigida subsp. antri-neptuni from Karpathos (g & h) (all photos taken by the first author except c, by Stavroula Fatsea).