Fernald (in Rhodora 31 (1929) 136) has shown that 
there are two species of Coptts in North America, which 
have been passing as Coptis trifolia (L.) Salisb. : an Alas- 
kan species found also in northeastern Asia, and the com- 
mon plant of northeastern America and Greenland. The 
specific name C. trifolia (L.) Salisb. belongs to the Alas- 
kan plant, and not to the northeastern species, the source 
of commercial gold-thread. The correct name of this lat- 
ter plant is C. groenlandica (Oeder) Fernald. 
Coptis trifolia auct., non Salisb. See Coptis groenlandica 
(Oeder) Fern. 
Coumarouna Aublet. See Dipteryx Schreber. 
Cybistax Donnell-Smithii (Rose) Seibert in Carn. 
Inst. Publ. 522 [Bot. Maya Area X XT] (1940) 392. 
Tabebuia Donnell-Smithii Rose in Bot. Gaz. 17 (1892) 
418, pl. 26. 
Cydonia oblonga Miller Gard. Dict., ed. 8 (1768) 
no. 1. 
Pyrus Cydonia Linnaeus Sp. Pl. (1758) 480. 
Cydonia vulgaris Persoon Syn. Pl. 2 (1807) 40, 658. 
Cydonia vulgaris Pers. See Cydonia oblonga Mill. 
Cypripedium bulbosum Mill. See Cypripedium Calceolus 
L., var. pubescens (Willd.) Correll. 
Cypripedium Calceolus L., var. pubescens 
(Willd.) Correll in Bot. Mus. Leafl. Harvard Univ. 7 
(1938) 14. 
Cypripedium Calceolus Linnaeus Sp. Pl. (1758) 951, 
pro parte. 
Cypripedium bulbosum Miller Gard. Dict., ed. 8 
(1768) no. 8. 
Cypripedium parviflorum Salisbury in Trans. Linn. 
Soc. 1 (1791) 77, t. 2, f. 2. 
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