1919] REHDER, NEW SPECIES, VARIETIES AND COMBINATIONS 57 



Ges. Dorpat, ii. 17, t. 6 (1887). — Picea cxcclsa lusus erecta Schroeter in 

 Vierteljahrsschr. Naturf. G^s. Zuerich, XLiii. 89 (1898). — Picea excelsa 



r 



var. europaea lusus pyramidata Schroeter in Ber. Schweiz. Bot. Ges. xiii. 

 107, fig. 3 (1903). — Picea excelsa var. pyramidalis subvar. pyramidata 

 Schneider in Silva-Tarouca, Uns. Freil.-Nadelh. 230 (1913). — Picea Abies 

 var. pyramidalis Nash in Jour. N.Y. Bot. Gard. xviii. 89 (1817). 



Picea Abies f. Remontii, comb. nov. — Abies excelsa Remontii R. Smith, 

 PI. Fir Tribe, 5 (187.^). — Picea excelsa Remontii Beissner, Syst. Einth. 

 Conif. 37 (1887). — Purpus in Moeller*s Dcutsch. Gaertn.-Zeit. xxi. 557, 

 fig. 4 (1906). — Schneider in Silva-Tarouca, Uns. Freil.-Nadelh. 230, fig. 

 206 (1913). 



Picea glauca f. aurea, comb. nov. — Abies canadensis aurea Nelson, 

 Pinac. 32 (1866). — Picea alba aurea Seneclauze, Conif. 23 (1868). — Beiss- 

 ner, Handb. Nadelh. 343 (1891). — Picea laxa L aurea Voss, Vilmorin's 

 Blumengaert. ed. 3, i. 1241 (1890). — Picea canadensis aurea Sudworlh in 

 U.S. Dept. Agric. Div. For. Bull xiv. 38 (Nomencl. Arb. Fl.) (1897). 



Though the oldest name for the White Spruce is Abies canadensis Miller, 

 the specific name " canadensis " cannot be used under Picea, as there exists 

 already the older homonym P. canadensis Link which is the valid name for 

 the Hemlock Spruce under the genus Picea. Therefore the specific name 

 of the next oldest binomial which is Pinus glauca Moench (1785) has to be 

 used and the correct name of the White Spruce becomes Picea glauca Voss 

 (see also Sargent in Bot. Gaz. lxvii. 208, 1919). 



Picea glauca f. coerulea, comb. nov. — Abies alba glauca Dimsdalc apud 



Knight & Perry, Syn. Conif. 36 (1850), nom. — Plumbly apud Gordon, 



Pinet. 3 (1858). — Abies alba coerulea Nelson, Pinac. 47 (1866). — Picea 

 alba coerulea Carriere, Traite Conif. ed. 2, 320 (1867), pro parte. — Picea 

 alba glauca Hort. apud Seneclauze, Conif. 23 (1868). — Picea laxa f. coerulea 

 Voss, Vilmorin's Blumengaert. ed. 3, i. 1241 (1896), — Picea canadensis 

 glauca (Moench) Sudworth in U.S. Dept. Agric. Div. For. Bull. xiv. 37 

 (Nomencl. Arb. Fl.) (1897). — Picea alba var. argentea Zederbauer in Sitz- 

 ber. Akud. Wiss. Wien Math. -Nat. Kl. cxvi. 1938 (1907). — Picea cana- 

 densis var. coerulea Schneider in Silva-Tarouca, Uns. Freil. -Nadelh. 224 

 (1913). — Pinus glauca f. coerula Voss in Putlitz & Meyer, Landlex. iv. 

 771 (1913). 



This is a form with very glaucous, sometimes nearly silvery white leaves. 

 The varietal name coerulea starts with Abies alba coerulea Nelson which is 



not based on any previously published name; the earlier varietal name 

 glauca cannot be used, as it would repeat the s]>ecific name without desig- 

 nating the type. The plant described as Abies rubra var. coerulea Ix)u- 

 don, Picea coerula Link or Pinus rubra ^. violacea Endlicher has been often 



L 



referred to this form, but according to the description it is apparently a form 

 of P. mariana Britton, Sterns & Poggenburg. 



Picea glauca f. nana, comb. nov. — Abies alba var. nana Jacques in Ann. 



Fl. Pom. v. 326 (1836); Monog. Conif. 67 (1837). — Loudon, Arb. Brit. iv. 

 2311 (1838).— Pinus alba nana Antoine, Conif, 87 (1842-45).— Pinus 



