Citrumelo

Citrumelo or Citromelo (X Citroncirus spp.) is also called Swingle citrumelo trifoliate hybrid, because it is a cold hardy citrus hybrid between a 'Duncan' grapefruit and a trifoliate orange (Poncirus trifoliata (L.) Raf.), developed by Walter Tennyson Swingle.

Citrumelo is widely employed as a citrus rootstock, being resistant to the severe citrus tristeza virus and to the Phytophthora foot rot as well as to blight, cold, and citrus nematode.^[1]

Taxonomy

Trifoliate orange, according to Swingle, belongs to a citrus related genera, called Poncirus, while grapefruit equivocally belongs to the genus citrus, hence the botanical name X citroncirus is a hybrid genus, derived from citrus and poncirus.

References

↑ Citrumelo by Citrus Variety Collection

External links

Citroncirus webberi - J.W.Ingram.&H.E.Moore.

Citrus

True species	Citron Indian wild orange Kumquat Mandarin Mangshanyegan Papeda Pomelo Clymenia Australian and Papuan wild limes

Major hybrids	Grapefruit Lemon Lime Orange

True and hybrid cultivars	Alemow Amanatsu Bergamot orange Bizzaria Bitter orange Blood lime Blood orange Buddha's hand Cam sành Cara cara navel Cherry orange Citrange Citrumelo Clementine Daidai Dekopon Fairchild tangerine Florentine citron Hassaku orange Hebesu Hyuganatsu Imperial lemon Iyokan Jabara Jaffa orange Kabbad Kabosu Kaffir lime Kakadu lime Kalpi Key lime Khasi papeda Kinnow Kiyomi Laraha Lumia Mandelo Mandora Melanesian papeda Melogold Meyer lemon Murcott Myrtle-leaved orange tree Ōgonkan Orangelo/Chironja Oroblanco Palestinian sweet lime Persian lime Perrine lemon Pixie mandarin Ponderosa lemon Ponkan Rangpur Reikou Rhobs el Arsa Rough lemon Sakurajima komikan orange Sanboken Satsuma mandarin Setoka Shangjuan Shonan Gold Sudachi Sweet lemon Sweet limetta Tangelo Tangerine Tangor Ugli fruit Valencia orange Variegated pink lemon Winged lime Xã Đoài orange Yuukou mandarin Yuzu

Non-hybrid Citrons	Balady citron Corsican citron Diamante citron Fingered citron Greek citron Moroccan citron Yemenite citron

Non-hybrid Mandarins	Nanfengmiju Cleopatra mandarin Shīkwāsā

Non-hybrid Papedas	Ichang papeda Citrus halimii or Mountain "citron"

Non-hybrid Pomelos	Banpeiyu

Australian and Papuan citrus (Microcitrus, Eromocitrus, and Clymenia subgenera)	Australian outback lime Australian round lime Brown River finger lime Desert lime Mount white lime (Microcitrus) New Guinea wild lime Russell River lime Clymenia

Kumquat/Fortunella hybrids (×Citrofortunella)	Calamondin Citrangequat Limequat Orangequat Procimequat Sunquat Yuzuquat

Related genera	Citrus glauca Poncirus/Trifoliate orange Triphasia Brassii Grandifolia Trifolia

Drinks	Chūhai Curaçao Grapefruit juice Lemonade Limeade Orange juice Yuja hwachae Yujacha

Products	Calcium citrate Citric acid Lemonene Limonene Neroli Orange flower water Orange oil Succade Zest

Diseases	Black spot CTV/Tristeza Exocortis Greening Mal secco Phytophthora citricola

Related topics	The Citrus Industry Citrus production Citrus rootstock Citrus taxonomy Cold-hardy citrus Hesperidium Japanese citrus List of citrus fruits Mother Orange Tree Orangery University of California Citrus Experiment Station University of California, Riverside Citrus Variety Collection

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