RUTACEAE. — CITRUS 145 



Frutex v. arbor 1-10-metralis, plerumque 1-5-metralis; rami 

 juniores angulati, saepe spinosissimi, 2-4 mm. diam. Folia angusta, 

 6-13.5 cm. longa et 1.5-3.3 cm. lata, plerumque 8-11.5 cm. longa et 

 1-3 cm. lata; petioli late alati, laminam saepe aequantes v. superantes, 

 obovato-elliptici v. oblohgo-spathulati, ad basin abrupte attenuati, 

 apice regulariter rotundati v. truncati v. subcordati; laminae ovato- 

 acuminatae, plus minusve caudatae, apice leviter emarginatae, ad 

 basin regulariter rotundatae v. obtuso-cuneatae. Flores grandes, 20- 

 35 mm. diam., 5-meri, solitarii, axillares; pedicelli 3-5 mm. longi; 

 sepala crassa, subtriangularia, 3 mm. longa et lata, margine minute 

 ciliata; petala oblonga, 1.5-2 cm. longa et 0.5-0.8 cm. lata; stamina 

 20, polyadelphia, initio usque ad apicem cohaerentia, deinde in fas- 

 ciculos 3-5 discedentia, 0.8-1 cm. longa; stylus 3-4 mm. longus et 

 1.5 mm. crassus, stigmate 2-2.5 mm. longo et 3 mm. crasso; ovarium 

 3 mm. longum ac crassum. Fructus grandis, ovalis, 7-10 cm. longus 

 et 9-10 cm. diam., ad basin tuberculato-sulcatus, apice papilla magna 

 vix prominente sulco circulari plus minusve 25 mm. diam. circum- 

 data coronatus; cortex crassus, 7-9 mm. diam.; segmenta 8-11; 

 pulpavesicularis,acida; semina 40-70 inquoquefructu,pro genere gran- 

 dia, 15-20 mm. longa et 10-14 lata et 7-11 crassa, ovato-acuta, poly- 

 embryonica. 



Western Hupeh: Pingshan-pa, in Ichang gorge, 10 kilometers 

 north-west of Ichang, cultivated, November 1907 (No. 4736, 4737, 

 fruit; Nanto, April 25, 1900 (Veitch Exped. No. 202, flowers); 

 San-yu-tung glen, 10 li from entrance, cultivated, July 1907 (No. 

 2230^, fruit; bushy tree 5 m. tall, Liang-shan-kou, about 17 

 kilometers south-east of city of Hsing-shan, alt. 500-700 m., ravine, 

 May 7, 1907 (No. 2230, twig with flowers, type; bush 1-2 m. tall, 

 flowers white); Li-er-kou, 14 kilometers north-north-west of city of 

 Hsing-shan, alt. 1400 m., escaped from cultivation, roadside, May 15, 

 1907 (No. 2230*; bush or tree 1-5 m. tall, flowers white). Eastern 

 Szech'uan: Kweichou Fu, Feng-hsiang gorge, spontaneous, May 

 1903 (Veitch Exped. No. 3307; 1 m. tall, flowers). Photographs 

 of 18 additional paratypic specimens in other herbaria are filed in the 

 herbarium of the Arnold Arboretum. These represent 9 collections 

 from 8 localities, 2 in Hupeh, 5 in Szech'uan and 1 in Kweichou 

 province.^ 



* They are listed in detail in the original description of the species, except the 

 following: eastern Szech'uan, Kweichou Fu, before December, 1887, Ernst Faber 

 (No. 316) in Herb. Kew. 



