Ranunculus confervoides (Fr.) Fr., Summa Veg. Scand.

Wiegleb, Gerhard, Bobrov, Alexander A. & Zalewska-Gałosz, Joanna, 2017, A taxonomic account of Ranunculus section Batrachium (Ranunculaceae), Phytotaxa 319 (1), pp. 1-55 : 21

publication ID	https://doi.org/ 10.11646/phytotaxa.319.1.1
persistent identifier	https://treatment.plazi.org/id/03E787B4-7759-FFB8-FF08-C98BFDE16B5D
treatment provided by	Felipe
scientific name	Ranunculus confervoides (Fr.) Fr., Summa Veg. Scand.
status

Treatment

11. Ranunculus confervoides (Fr.) Fr., Summa Veg. Scand. View in CoL 1: 139 (1845).

≡ Batrachium confervoides Fr., Bot. Not. 1845: 121 View in CoL (1845).

Type: FINLAND: Oulun Pohjanmaa, ‘Uleåborg’ Oulu, J. A. Ångström s.n. ( UPS, lectotype designated by Jonsell (1996: 6)).

= Ranunculus aquatilis var. eradicatus Laest. View in CoL , Nova Acta Regiae Soc. Sci. Uppsal. 11: 242 (1839).

= Ranunculus eradicatus (Laest.) F. Johansen, Canad. Field-Naturalist View in CoL 48: 127 (1934).

= Ranunculus trichophyllus subsp. eradicatus (Laest.) C.D.K. Cook, Mitt. Bot. Staatssamml. München View in CoL 6: 622 (1967).

Described from Sweden (‘Karesuando’).

– Batrachium eradicatum (Laest.) Fr., Bot. Not. 1843: 114 View in CoL (1843), nomen invalid., sine descr. et basionymo.

Description

Annual or summer or wintergreen perennial, hydrophyte; aquatic state erect-spreading with capillary leaves only (myriophyllid), terrestrial state caespitose with subrigid capillary leaves. Shoots up to 40 cm long, diameter 0.3–1.5 mm, glabrous, pale green, rooting at all nodes, internodes of the middle part of the shoot longer than adjacent leaf. Laminar leaves absent. Intermediate leaves absent. Capillary leaves present, alternate, 10–35 mm long, obconical, green, glabrous, segments extremely fine, flaccid, the ultimate ones very long, narrowing outwards, middle part equal to the lateral ones, length between first and second bifurcation 3–10 mm, number of the lamina divisions 2–4(–5), number of final segments up to 80; petiole 3–18 mm long. Stipules for more than 2/3 adnate to the petiole, glabrous, apex rounded. Peduncles (10–)20–30(–50) mm long, thin, curved, glabrous. Sepals 5, 2–3 mm long, ovate, greenish, sometimes blue-tipped, spreading, caducous, rarely persistent. Petals 5, 3–4.5 mm long, ovate to slightly obovate, white with yellow claw, not contiguous during anthesis. Nectar pits 1 per petal, lunate. Stamens 4–10(–13). Carpels 5–15(–25), 1–1.5 × 0.7–1.2 mm, obovate, pubescent, style subterminal, caducous. Receptacles subglobose, hairy.— Chromosome number. 2n = 16, 24, 32.