BOTANY OF CITRUS FRUITS. 17 



head; bark greyish brown; thorns generally present, 1-2 to 2 

 inches long, sharp, stout; leaves oval or ovate oblong, 3 to 4 inches 

 long, smooth, shining, somewhat lighter below than above, mar- 

 gins entire, or very slightly serrate; petiole ~y 2 to 1 inch long, 

 slightly winged (occasionally with quite a broad wing) ; flowers 

 axillary in clusters of one to six, white, sweet-scented, smaller 

 than those of C. vulgaris; calyx cupped; sepals four to five, awl- 

 shaped, thick, greenish, persistent; petals usually five, oblong, 

 1 to 1-4 inches long, thick, fleshy, recurved; stamens twenty to 

 twenty-five, hypogynous, filaments flattened, united in groups, 

 shorter than the petals; pistil distinctly divided into stigma, 

 style and ovary; stigma knob-like, style long and slender, ovary 

 rounded, ten to fourteen loculed; fruit globose or oblate, light 

 orange to reddish, rind smooth; pulp juicy, sub-acid; juice sacks 

 spindle-shaped, sometimes larger than those of C. vulgaris; seeds 

 few or many, oblong ovoid, plano-convex, generally broad, wedged 

 or pointed at the micropylar end, marked with oblique ridges 

 surrounding one or two plain areas. Native of China or Cochin 

 China. 



Citrus nobilis Lour., Flor. Coch., 2:466, 1790. The jnan- 

 darin orange. A small tree, twelve to twenty feet in height, 



with a dense head of upright or willowy drooping branches; 

 bark dark brownish or streaked with gray; branchlets light 

 green or dark in color, small, slender, round or angled, thorn- 

 less or provided with small sharp spines; leaves small, lanceo- 

 late to oval, slightly crenate; petioles short, wingless or with 

 very small wings; flowers terminating the branchlets or axillary, 

 sometimes clustered, 3-4 to 1 inch across, sweet-scented; calyx 

 small, shallow, cupped, the petals small; petals white, fleshy, 

 recurved; stamens eighteen to twenty-three in number, shorter 

 than the petals; pistil small, resembling that of 0. Aurantium; 

 ovary nine to fifteen loculed; fruit distinctly oblate, orange to 

 reddish in color, pulp sweet or sub-acid; juice sacks broad and 

 blunt; seeds top-shaped, beaked, cotyledons pistache green; em- 

 bryos one or more; sections separating readily from each other 

 and from the rind; rind thin, oil cells somewhat balloon-shaped 

 or oval. Native of Cochin China. Generally admitted to be 

 somewhat hardier than the sweet orange. 



Citrus decumana L., Syst. Nat. Ed. 12, 2:508, 1767. Pomelo 



