CouTolTulaceae VEXT. 



Convolvulus aivensis L. Spec. PI. ed. II (1762) p. 218; Ledeh. Fl. Alt. I. p. 224: Ledeb. 

 FI. Ross. Ill, p. 91; Turczan. Fl. Baical.-Dahur. (1849) p. 353, no. 809; Herder, PI. Radd. 

 (1872) p. 490, no. 150; KpBU. O.i. A.aT. IV (1907) p. 868. 



Near the \'illage of Askys, on the Abakan Stejipe, where scattered along borders of 

 fields, etc. With flowers and flower-buds in the middle of June. The specimens collected 

 belong to the forms vulgaris Ledei!. 1. c. and angustatus Ledeh. 1. c. Withered remains of 

 this species I have also observed on the steppes along the L'lu-keni, at the end of August. 



Distribution: Europe, except the most northern regions, south-western Asia, Sibe- 

 ria, in the Yenisei valley northwards to about 57° north hit, North Africa. In the East this 

 species is replaced by the veiy nearly allied Convoloiiliis sagiliifolius Fischer. 



Convolvulus Amniannii Desr. in Lamarck, Encycl. Method. III. p. .549; Ledeb. Fl. Alt. 

 I, p. 226; Turczan. Cat. Baical. no. 798; Karel. et Kiril. Enum. PL FI. Alt. no. 600; Ledeb. Fl. 

 Ross. Ill, p. 90: Turczan. Fl. Baical.-Dahur. (1849) p. 352. no. 808: Herder. PI. Radd. 

 (1872) p. 489, no. 149; Kpbi.i. d'.i. A.ix. IV (1907) p. 869. 



Ratlier common on the Abakan Steppe, especially in dry, sandy or stony places; with 

 flowers in June. It also occurs in the Urjankai country, where I have observed it in seve- 

 ral places on the steppes between Tapsa and Cha-kul, where past flowering at the end of 

 August. 



Distribution: Southern Siberia, northern Mongolia. Manchooria. China. 



Cufscutaeeae DUMORT. 



Cuscuta europaea L. Spec. PI. ed. II (1762) p. 180: Ledeb. Fl. Alt. I, p. 294: Tur- 

 czan. Fl. Baical.-Dahur. (1849) p. 357. no. 811; Herder, PI. Radd. (1872) p. 499, no. 154: 

 KpM.1. <l)ji. A.1T. IV (1907) p. 874. 



Here and there on islets in the rivers Yenisei and Abakan, where I have observed 

 it on plants as Campanula. Urtica, Cacalia hastala, Artemisia vulgaris, and others. With 

 young flower-buds in June. 



Distribution: Nearly all over Europe, except the most northern parts, Siberia, north- 

 wards to about 6r north lat., Manchooria, south-western Asia, roughly to the north of 

 India, North Africa. 



Cuscuta lupuliformis Krocker, Fl. Siles. I (1787) p. 261; Herder, PI. Radd. (1872) p. 

 501, no. 156; Kpw.i. .kn. A.n-. IV (1907) p. 875. C monogyna Ledeb. Fl. Alt. I, p. 294; Tur- 

 czan. Fl. Baical.-Dahur. (1849) p. 358, no. 812; Herder, 1. c. (1872) p. 500, no. 155. 



var. asiatica Engelm., Kpw.i. 1. c. (1907) p. 875. 



The Asiatic specimens differ from the European ones in having the corolla-scales 

 entire, ovate or broadly ovate, not 2-cleft. Of very common occurrence on low, sandy 

 islets in the Bei-kem, near the mouth of the Tapsa, where it is parasitic on SaKv vimimi- 

 lis. I have collected it in the last days of August with fruits of the size of a pea. 



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