238 Systematik und Pflanzengeographie. 



gewisser Walnussbäume um einen Monat und mehr früher blühen. 

 Ferner giebt D e l p i n o an, dass gewisse Bäume von J. regia 

 protandrisch, andere hingegen protogyn sind. Dasselbe hat 

 Pringle für J. cinerea festgestellt; die männlichen Blüten 

 blühen bei einem Theile der Bäume zugleich mit den weiblichen 

 Blüten eines anderen Theiles, die Blüten des anderen Geschlechtes 

 entwickeln sich bei beiden Theilen zehn Tage später, also eben- 

 falls gleichzeitig. 



Unter den Abbildungen seien besonders die der Zweige der 

 Bastarde Carya minima X oliviformis, C. oUviformis X tomentosa 

 und C. oUviformis X sulcata hervorgehoben, ferner die Habitus- 

 figuren der Bäume von C. oUviformis, C. aguatica, C. amara^ 

 C. alba und die kennzeichnenden Darstellungen des Aussehens 

 mehrerer Rinden. Andere Figuren beziehen sich auf Knospen, 

 Blüten und Früchte. Am Schluss weist der Verf. auf ein neues 

 Bulletin der Division of Pomology of the United States Departement 

 of Agriculture hin. 



Uebersicht über die behandelten Arten: 

 Carya Kutt. {Hicoria Raf.). 



I. Section Apocarya or Pacania. Bud scales 4 to 6, valvate in pairs, 

 often witb apical lobes and in some species more or less enlarging into leaves 

 in spring, conspicuously yellow dotted (except sumetimes in the first); larger 

 lateral buds often long stalked; staininate catkins from lateral buds of the 

 preceding year as well as at base of the new growth. 



* Outer bud scales uiore or less fused, loosenicg at base; terminal buds 

 elongated except in the second. 



t Nut mostly elongated, subterete; the husk dehiscent nearly or quite 

 to the base, its lobes usualh^ with a raised margin. 



1. Carya oUviformis Nutt. (H. Pecan [Marshall] Britton). Buds elon- 

 gated, gray, the terminal appressed ; nut ovoid to ellipsoid, brown, 

 irregularly flecked and striped with a dasker colour, 2-celled ; kernel 

 little ruminated. 



2. C. rnyristiciformis Nutt. Buds ovoid, densely brown scurfy, the 

 tomeutose inner scales of the terminal soon exposed; nut ellip- 

 soidal, brown or gray, conspicuously dark striped. 4-celled below ; 

 kernel not ruminated. 



■ff Nut usually as broad as long, very thin shelled, flattened, 4-celled 

 below. 



3. C. aquatica Nutt. 



** Scales of terminal buds free above, all but the outermost developing 

 into leaves ; nut usually as broad as long, elliptical in cross section, 

 4-celled below. 



4. C. amara Nutt. {H. minima [Marshall] Britton). 



II. Section Eucarya or Euhieoria. Buds always truly scaly, their scales 

 10 or more, imbricated or the outermost on lateral buds usually a closed sac 

 soon Splitting from the top, the inner hairy ; staminate catkins at the base of 

 the new growth only, each group of three on an exserted common pedunole; 

 nuts (except in forms referred to under alba and sulcata) firm shelled, 4-celled-at 

 base ; kernel not ruminated. 



* Buds small (5 to 10 mm long), becoming subglobose toward spring their 

 outer scales commonly glandulär dotted; twigs glabrate? cherry coloured 

 to gray, slender for the group. 



5. C. Porcina Nutt. (H. glabra [Miller] Britton). 



** Buds large (the terminal 8 to 15 mm long), ovoid, nearly or quite 

 glandless ; twigs frequently somewhat tomentosa at end, bufF, gray or 

 brownish, usually much stouter. 



