Convolvulus calvertii subsp. calvertii

Wood, John R. I., Williams, Bethany R. M., Mitchell, Thomas C., Carine, Mark A., Harris, David J. & Scotland, Robert W., 2015, A foundation monograph of Convolvulus L. (Convolvulaceae), PhytoKeys 51, pp. 1-282 : 162-163

151a. Convolvulus calvertii subsp. calvertii Figure 20, t. 8-14

Convolvulus saxatilis M.Bieb., Fl. Taur.-Caucas. 1: 146. 1808, nom. illeg., non Convolvulus saxatilis Vahl (1794). ( Marschall von Bieberstein 1808: 146). Type. CRIMEA, near Karassubasar and Sympheropolin (whereabouts unknown).

Convolvulus lanuginosus sensu Ledeb., Fl. Ross. 3: 88. 1847, nom. illeg., non Convolvulus lanuginosus Desr. (1792). ( Ledebour 1847: 88).

Convolvulus calvertii var. tauricus Bornm., Beih. Bot. Centralbl. 22(2): 181.1906. ( Bornmüller 1906: 181). Type.CRIMEA, Callier 155 (lectotype K! ex Herb Churchill, designated here; isolectotypes E!, HBG, JE, K!, OXF!, P!, STU, W!, reported from LE but not seen there).

Convolvulus tauricus (Bornm.) Juz., Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk. S.S.S.R. 12: 214. 1950. ( Juzepczuk 1950: 214). Type. Based on Convolvulus calvertii var. tauricus Bornm.

Convolvulus calvertii subsp. tauricus (Bornm.) Smoljan., Fl. Evropeiskoi Chasti SSSR (A.Federova) 5: 97. 1981. ( Smoljaninova 1981: 97) Type. Based on Convolvulus calvertii var. tauricus Bornm.

Convolvulus triqueter Rehmann ex Petrov, Byull. Moskovsk. Obshch. Isp. Prir., Otd. Biol., n.ser., 44: 144. 1935, nom. illeg., non Convolvulus triqueter Vahl (1794). ( Petrov 1935: 144). Type. Based on Convolvulus saxatilis M.Bieb.

Convolvulus bracteosus Juz., Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk. S.S.S.R. 12: 217. 1950. ( Juzepczuk 1950: 217) Type. CRIMEA, Rehmann 663 (holotype location uncertain, probably LE; isotype P!).

Convolvulus calvertii subsp. bracteosus (Juz.) Smoljan., Fl. Evropeiskoi Chasti SSSR (A. Federova)5: 99. 1981. ( Smoljaninova 1981: 99). Type. Based on Convolvulus bracteosus Juz.

Distinguishing features.

Stems and leaves with prominent spreading hairs as well as appressed sericeous hairs. Leaves oblong or oblanceolate, 5-10 times longer than broad.

Distribution.

Turkey (Balls 1542, Stainton & Henderson 5372, Watson 2935); Crimea (Busch s.n. [6/6/1905], Callier 4563); Iran (Furse 7519, Rechinger 4765); Turkmenistan (Polyakova 226, Gubanov 399, Federov s.n. [3/6/1917]).

Notes.

Bornmüller (1906) did not mention any specific type specimen for his var. tauricus but made reference to collections from Crimea by Marschal von Bieberstein and Callier. Juzepczuk (1950) mentioned no type but the only collection cited was Callier 155 "pro (maxima?) parte". Sa’ad (1967) cited the same collection from LE as holotype without qualification and without seeing the specimen. Smolyaninonova (1981) proposed a lectotype from the location "in collibus cretaceis ad Barultsscha prope Karasabazar" but without collector or number. In order to end the uncertainty we have designated Callier 155 collected at "Kreideberge in Karakusch bei Karasubazar" at Kew as the duplicate at Berlin is presumed destroyed and we were unable to find a specimen at LE. This material is widely distributed and all specimens we have seen represent the same species.

Convolvulus bracteosus is a form of Convolvulus calvertii with narrowly oblong-elliptic bracts 5-8 mm wide, these exceeding the head. The basal leaves are oblanceolate. Juzepczuk & Kurgianov 1580 (LE) is a good example of this form. The exact identity of Convolvulus saxatilis is uncertain but it is probably Convolvulus calvertii subsp. calvertii .