Genus Petasites Miller Fam: Asteraceae (Compositae)
Genus: Petasites Miller
English Name: Butterbur
Description:Baskets medium. Shell bell-like, composed almost entirely of a series of leaflets. Blossoms heterogeneous, dioecious. Males with few narrow tubular peripheral, female flowers and numerous infertile hermaphrodite; females with multiple peripheral female blossoms, closely tubular, obliquely cut and therefore tongue-like and numerous, fruitless, hermaphrodite blossoms. Blossom bed naked. Bar bipartite. Perennial plants with creeping rhizome and very large leaves. Blossom stems covered only with flakes. 1. The leaf stems hollow, topped with two edges. Stigmas of the interior blossoms short, oval and blunt ...................... (1) P. hybridus (L.) Gärtn.
1*. The leaf stems thick and rounded top. The stigma of the interior blossms linear-lanceolate, pointed ............................................................... 2.
2. The leaves kidney-shaped, heart-shaped. Male inflorescences almost thyroid, simple; female oval panicle with branched lower blossom stems,..... rhizome is not bold. Stigmas divided to the base …………………………………………............................................. (2) P. albus Gärtn.
2* The leaves triangle - a heart. Inflorescences simple, cluster-shaped, oval. Rhizome tuber-like bold. Stigmas fused together to 1/2 ......................... .................................................................................................................................................................................. (3) P. kablickianus Tsch.(1). P. hybridus (L.) Gärtn. (P. officinalis Monch, Tussilago h. L.) (Perennials) – They grow on stony moist places, along rivers and streams; in foothill areas (1). (JI, X). It blooms in the spring, and later developed leaves. Fig. 1436.
var. hybridus - scales on the stem and blossoms are reddish. Inflorescence simple cluster-shaped. Disseminated form.
var. ochroleucus (Boiss. et Huet) Hayek (P. o. Boiss et Huet, P. h. var. adriaticus Rohl.) - greenish scales. Blossoms yellow. Inflorescence at the bottom branching. Strandja mountain, near Gorna Oryahovitsa.
(2). P. albus (L.) Gärtn. (Tussilago a. L.) (Perennials) - Along mountain rivers and streams, almost all the mountains (2). It blooms in the spring, and later developed leaves.
(3). P. kablickianus Tsch. (P. glabratus Borb.) (Perennials) - Along of Pirin mountain streams (2). V - VII.
References:„Флора на България”, Н. Стоянов, Б. Стефанов, Б. Китанов, част II, Наука и Изкуство, София, (1967)The plants commonly referred to as Butterbur are found in the daisy family Asteraceae in the genus Petasites. They are mostly quite robust plants with thick, creeping underground rhizomes and large Rhubarb-like leaves during the growing season. Another common name for many species of this genus is Sweet Coltsfoot.
From Wikipedia, the free encyclopedia
Distribution in Bulgaria: (Conspectus of the Bulgarian Vascular Flora) = conspectus&gs_l= Zlc.
Distribution:
SPECIES:
Petasites hybridus (L.) Gaertner, Meyer et Schreb. - Butterbur,Bog rhubarb, Devil's hat and Pestilence wort.
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