Cytisus wulffii V.I.Krecz. in Bot. Zhurn. SSSR 25: 262 (1940)

Sennikov, Alexander N. & Tikhomirov, Valery N., 2024, Atlas Florae Europaeae notes, 33. Taxonomic synopsis of East European species of the Cytisus ratisbonensis group (Fabaceae), PhytoKeys 238, pp. 157-197 : 157

10. Cytisus wulffii V.I.Krecz. in Bot. Zhurn. SSSR 25: 262 (1940)

- Chamaecytisus wulffii (V.I.Krecz.) Klásk. in Preslia 30(2): 214 (1958).

Type.

Crimea. "Prope Yalta, in pineto supra Uchan-su", 7/ 16.05.1901, W. Tranzschel (lectotype LE01080947, designated here; isolectotypes LE01080946, LE01080948). Fig. 10 .

Description.

Small prostrate shrubs with abundantly branching stems up to 20 cm above ground. Leaves with obovate to oblong leaflets, hairy above, with numerous appressed hairs 0.3-0.7 mm long below, petioles sparsely covered with appressed to spreading hairs. Flowers strictly lateral, 1-4 in axils, on pedicels 3-5 mm long, yellow; calyx 14-15 mm long, with laxly appressed hairs 0.5-1 mm long; standard subrotund, partly hairy above.

Distribution.

Europe: Crimea ( Tzvelev 1987; Yena 2012; Fedoronchuk 2022).

Ecology.

The species occurs on open gravelly and rocky slopes and in alpine meadows at the upper limit of pine forests.

Chromosome counts.

Unknown.

Notes on nomenclature.

Kreczetowicz (1940) indicated the type of Cytisus wulffii in the protologue. He wrote “Typus” on two specimens of the type gathering, which are, therefore, syntypes.

Notes on taxonomy and distribution.

This species is most similar to Cytisus polytrichus M.Bieb., which occurs in the same area in the Crimea, but in the upper mountain zone and differs by patent (vs. appressed) hairs on its calyces and pedicels. Populations of both taxa may locally overlap ( Pifkó and Barina 2016). Cytisus wulffii was originally reported also from the neighbouring area in the north-western Caucasus ( Kreczetowicz 1940; Grossheim 1952; Zernov 2006); these records were rejected ( Tzvelev 1987) and referred mostly to C. elongatus , which may look similar, but differs in subpatent pubescence.

Figures

Figure 10. Lectotype of Cytisus wulffii V. I. Krecz.