Juglans JUGLANDACEAE-BETULACEAE Engelhardtia 



3. Juglans Linn. Walnut ^^S (Ho T'ao Shu) 



Brs. with scaly buds and chambered pith: stamina te fls. in drooping catkins; the 

 pistillate in terminal racemes: fls. without perianth, but the pistillate with a 3-lobed 

 involucre: fr. a large indehiscent drupe with a deeply lobed edible seed. About 16 

 species, in America and Eurasia; 3 in China. (The Latin name for /. regia, derived 

 from Jovis glans, Jupiter's Acorn.) 



Key to the Species 



Fr. solitary or few, glabrous : lfts. glabrous or nearly so. 



Lfts. 7-9, entire : nut with a thin partition 1 . J. regia 



Lfts. 15-23, irregularly serrate: nut with a thick bony partition 2. J. nigra 



Fr. 6-10, in pendulous racemes, viscid-pubescent : 



Lfts. 9-17, pubescent, serrate 3. J. cathayerisis 



1. Juglans regia Linn. English Walnut |£$£ (Ho T'ao; Stone Peach) (R.M.117). 

 Tree, to 30 m.; fls. IV; fr. VII-IX. Eurasia; locally in Ku. Grown for its edible 

 nuts. Fig. 49. 



2. Juglans nigra Linn. Black Walnut M-MW (Hei Ho T'ao) (R.M.118). Tree, to 

 50m.; fls. IV; fr. VII-IX. Introduced from eastern North America; locally in 

 Che., Ku. Planted. 



3. Juglans cathayensis Dode Wild Walnut UMtt (Yeh Ho T'ao) (R.M.119). Tree 

 to 25m.; fls. IV; fr. VII-IX. Central China; locally in An., Ku. Open woods. 



4. Carya Nutt. Hickory LLj^feM (Shan Ho T'ao Shu) 



Brs. with scaly buds and solid pith: staminate fls. in drooping catkins, the 

 pistillate in terminal spikes, with 4-lobed involucre: fr. an angled or ovoid nut in a 

 woody dehiscent husk: seeds edible. 20 species, in eastern North America, and one 

 in China. (The Greek name for the Walnut Tree.) Fig. 50. 



1. Carya illinoensis (Wangenh.) K. Koch. (C. pecan Engl. & Graebn.) Pecan =HfU 

 \U&\k (Mei Kuo Shan Ho T'ao; American Mountain Walnut) (R.M.121). Tree ? 

 to 50 m.; fls. V; fr. VIII-X. Husk separating into 4 valves. Introduced from 

 east-central United States and Mexico; locally in Ku. Planted. 

 Carya cathayensis Sarg., with fewer lfts. and smaller frts., is found in southern 

 Chekiang and in Kweichow. 



5. Engelhardtia Leschen. & Blume fftSfll (Huang Ch'i Shu) 



Brs. with solid pith: both staminate and pistillate fls. in pendulous spikes; the 



pistillate with a 4-lobed perianth: fr. a globose nutlet developing at the base of a 



3-lobed bract: middle lobe of bract longer than lateral lobes. About 5 species, in 



eastern Asia; all occurring in China. 



1. Engelhardtia chrysolepis Hance Hf2 (Huang Ch'i; Yellow Basket-willow) (Lee 



226). Tree, to 20 m.; fls. golden yellow, VI-VII; fr. VIII-IX. Eastern Asia; 



locally in Che. Open woods. Fig. 51. 



39. BETULACEAE Hazel Family &%& (Hua Mu K'o) 

 Deciduous trees or shrubs with alternate simple Ivs.: fls. appearing before or 

 with the lvs.: staminate fls. in catkins; the pistillate in clusters, spikes, or catkins, 

 with 2 styles: fr. a 1-seeded nut. 6 genera with over 100 species, in north temperate 

 and arctic regions; all 6 genera and 40 or more species in China. 



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