40 BOTANICAL GAZETTE [january 



femineis accurate discernere saepe impossibile 

 est).^ 



(i) Glandula ventralis satis brevis lataque, vix 2plo 

 longior quam lata, apice late truncata, quam 

 bractea obovata vulgo 2^-3plo brevior;^ 

 amenta 2-2 .5:0. 8-1 cm. magna; folia tantum 

 novella subtus sparse sericea, cito glabra, 

 superne estomatifera, ceterum ut in p. 57 

 descripta; petioli vix ultra 8 mm. longi 



18. S. arctophila 



(2) Glandula ventralis pl.m. anguste ovato- 



rectangularis vel anguste conica, apice saepe 



leviter incrassato truncata, quam bractea vix 



duplo brevior vel folia superne stomatifera, 



semper integerrima vel plantae aliis signis 



diversae. 



Amenta perfecte evoluta vix ultra 1.5:0.8 



cm. magna; folia matura satis crasse papy- 



racea, subtus pl.m. perspicue et anguste 



reticulata, vulgo elliptica, late elliptica, 



obovalia vel rotundata, vix ultra 2,5:1. 2-2 



cm. magna; stipulae nullae (vel minimae 



punctiformes) (si folia superne stomatifera 



confer, etiam 14. S. anglorum formas et30. S. 



glacialem speciemvalde incomplete cognitam). 



Folia superne pl.m. stomatifera; ramuli 



annotini hornotinique vulgo breves; rami 



saepe stolones subterraneos tenues vix ad 



I mm. crassos emittentes. .17. S. stolonifera 



Folia superne baud (var. camdensis excepta) 



stomatifera; ramuli hornotini annotini que 



pl.m. elongati, rami ut videtur baud sto- 



loniferi 16. S. ovalifolia 



'5 Of course if their exact locality is known, we shall certainly be able to determine 

 -even young male branchlets. 



^ The shape of the ventral gland is often rather variable in any species because the 

 gland may be more or less lobate, bifid, or bipartite. 



