228 



longo, pubescente; lamina 3" circiter longa, nnum lata. Siipulae 

 Jiueaii-lanceolatae loiige acumina(ae uervosae, dorso pilosae deciduae. 

 Ainen(a niasciila pollicaria, laxa, squamis disjunclis patenfibus dis- 

 tincte slipilatis dense nervoso-striatis, sericeo-cilialis castaneis. Stro- 

 bili pedunculatj, peduuciilo bi — tribracteato suisiini tonientoso, ovato- 

 cylindrici, 2" circiter longi, imbricali ; bracteae ovato-laiiceola(ae acu- 

 tae aridae biflorae; involucri foliolum exterius 6"'lougum, 4'" latum, 

 iuterius nnculam aequans ovataiu convexo-compiessani, glabiani, ner- 

 vis 10 liueatam. 



799. D. laxißora S. et Z. 



Amenta florenfia foemiuea liliformia laxa biacteis rcmoüs tix 

 nltra 12 lauceolatis louge acumiiiaüs. Folia uovella ovato-elliptica 

 acuuiina(a, dense »ena(a, cos(a*a et in ueivis sericea. 



130. (88 Endl.) BETÜLACEAE Rieh. 

 448. Betula Touruef. 



800. B. grossa S. et Z. B. ramulis novellis resinoso-pnncta- 

 tis aiigulatis glabiis, foliis e basi rotundata vel snbcoidata ovato-ellip- 

 ticis acutis vel acumiuatis iiiaequaliter argute serratis subtus punc- 

 tulatis et ad nervös pilosis, strobilis solitariis breviter pedunculatis 

 vel subsessilibns erectis, foliis 1- — 2 suffultis, grossis obloiigo-ellipticis, 

 squamis tiisperniJ.s extus liirtis late caneatis breviter trilobis, lobis 

 subaeqnalibus vel niedio parum longiore, rotundatis, alis loculaniento 

 oblongo angnstioribiis, sorsuin latioribns. 



Folia 14 — 2" longa, 10 — 15'" lata, subtns nervis parallelis cos- 

 tata resinoso-punctata, nee reticulata, floralia 1 — 2; petioli semipol- 

 licares. Strobili pollicares, grossi, peduncalo quam petioli breviore 

 vel subuullo. Squamae firinae, extus cauescenti-hirtae. 



801. B. carpiuifoUa S. et Z. B. ramulis novellis glabris tere- 

 tibus, foliis inferioribus e basi cordata ovatis, superioribns basi ro- 

 tundatis vel cuneatis obloiigis, summis lanceolatis, omnibus louge acu- 

 miuatis argute et inaequalifer serratis supcrue glabri- subtus ad ner- 



