CITRUS CULTURE IN HAWAII 



21 



foliage is typical of that of the sweet orange. The tree blossoms mainly in the early spring, 

 but may blossom several times during the year. 



Fruit — Form, more or less oblong, with somewhat depressed ring at stigmatic end ; size, 

 medium ; color, pale orange ; skin, smooth or slightly pebbled, thin, and tough ; pulp, 

 yellow, juicy, subacid ; seeds, none to 5 or 6. . 



Mediterranean Sweet 



The Mediterranean Sweet variety was introduced into Hawaii 

 by the station in 1906, and budded on rough lemon stock. The 

 plants were set in the citrus orchard in 1909 and proved to be 

 thrifty and prolific. None of the trees has been attacked by gum 

 disease. The fruit splits easily when the orchard has not been 

 properly irrigated. The Mediterranean Sweet is a good orange 

 but generally is considered inferior to the Hawaiian orange. Coit 

 (7, p. 71) reports the Mediterranean Sweet as having been intro- 

 duced into California from southern Europe through American 

 and English nurserymen. The season in Honolulu is late summer 

 and fall. 



The tree is small; the leaves are narrow and numerous; and the small branches are 

 almost thornless. '' 



Fruit — Size, small to medium; form, spherical to oblate; color, deep orange; skin, of 

 fine texture ; juice, abundant and sweet ; seeds, few and small. 



Navelencia 



The Navelencia originated in California, from where the Ha- 

 waii station obtained four grafted trees in 1906. These were on 

 sour orange stock, but suffered considerably from gummosis, due 

 to the poor soil in which they were growing and to deep planting. 

 The variety has willowlike twigs and matures its fruit after the 

 navel varieties have ripened, and before, or at the beginning of, 

 the Valencia season. The Navelencia apparently is not as satis- 

 factory for Hawaii as is the Valencia. 



Fruit — Form, oblong ; size, medium : flesh, smooth, firm, and thin-skinned ; pulp, juicy, 

 plentiful, and subacid ; seeds, none to few. 



St. Michael 



The St. Michael (Paper Rind St. Michael) originated on the 

 island of St. Michael, Azores, and was introduced into Hawaii by 

 the station from Florida. 



The trees are small, thorny, and prolific, and the fruit ripens about midwinter. 

 Fruit — Size, small ; form, roundish to oblong ; rind, firm, slightly pitted, and thin ; flesh, 

 coarse and yellow ; acidity and sweetness are well blended in the juice ; seeds, few. 



• • 



Ruby 



The Ruby was introduced into Hawaii by the station in 1906. 

 The trees are prolific, medium in size, and almost thornless. 



Fruit — Size, small ; form, round ; color, deep orange at full maturity ; surface, pebbled ; 

 rind, firm ; pulp sacs, small, juicy, and of pleasant flavor ; seeds, about a dozen. 



Sour (Seville or Bigarade) 



The sour orange was introduced into Hawaii probably from 

 Florida by private growers. It is a native of southern Asia. The 

 seeds were obtained locally by the station. 



The tree reaches a height of about 20 feet, is upright, and has a roundish top of dense 

 foliage. It is a prolific bearer. The bark is smooth and free from disease. The fruit 

 has only one use in Hawaii, the seeds being planted for seedling-stock production. This 

 stock is very resistant to gummosis. 



Fruit — Size, large ; form, spherical to slightly oblate ; very attractive pebbled surface of 

 rich deep yellow ; rind, thick ; pulp, coarse and very sour. The flavor does not prove to be 

 a substitute for lemon or for lime (fig. 4, A). 



