Part 3, 1911] RUTACEAE 1S9 



21. Zanthoxylum Limoncello Planch. & Oerst.; Triana & Planch. 



Ann. Sci. Nat. V. 14 : 312. 1872. 



Zanthoxylum Pteroia Seem. Bot. Vov. Herald 94. 1853. Not Z. Plerola H.B.K. 1823. 



Zanthoxylum costaricense Dorm. Smith, Bot. Gaz. 13 : 190. 1888. 



Fagara Limoncello Engler, in E. & P. Nat. Pfl. 3< : 117. 1896. 



Fagara C/idei Engler, Bot. Jahrb. 21 : Beibl. 54: 22. 1896. 



Fagara costaricensis Engler, Bot. Jahrb. 21 : Beibl. 54: 25. 1896. 



Zanthoxylum foe/idum Rose, Contr. U. S. Nat. Herb. 5 : 112. 1897. 



A glabrous or minutely puberuleut ill-scented shrub 2-6 m. in height with rather 

 slender, flexuous branches, and greenish or greenish-brown twigs, which are usually armed 

 with solitary or paired, curved, compressed, brownish stipular prickles 4-5 mm. long; 

 leaves 3-foliolate, rarely 5-foliolate, the petioles terete or nearly so, grooved, 1.5-3 cm. long, 

 occasionally armed with prickles ; leaflets oblong-elliptic or lance-elliptic, 2-7.5 cm. long, 

 1.5-2.9 cm. broad, acute to acuminate, blunt and more or less retuse at the apex, cuneate 

 and often inequilateral at the base, when young rather light-green, with age becoming 

 darker, lustrous above, paler beneath and more or less minutely puberuleut, coriaceous, 

 the margins crenulate or nearly entire, pellucid-glandular, the glands scattered, those 

 bordering the margin at the base of the crenatures rather conspicuous ; panicles axillary 

 and terminal, the branches minutely and sparsely puberulent when young, glabrous when 

 old ; staminate flowers : sepals 4, semiovate or triangular-ovate, obtuse, or sometimes acutish , 

 at the apex ; petals 4, oblong to broadly elliptic, 1.2-2 mm. long; stamens 4, longer than the 

 petals ; follicles globose or globose-obovoid, 4.5-6 mm. long, short-stipitate, verrucose- 

 glandular, brown at maturity; seeds subglobose, 3-3.5 mm. in diameter, black, shining, 

 smooth or slightly wrinkled. 



Type locality: Volcan de Chiriqui, Veraguas, Panama. 



Distribution : Southern Mexico, Costa Rica, and Panama. 



22. Zanthoxylum insulare Rose, N. Am. Fauna 14 : 79. 1899. 



Fagara Culantrillo insularis Krug & Urban ; Urban, Bot. Jahrb. 21 : 574. 1896. 



A glabrous shrub or tree 4-18 m. high with a grayish or grayish-brown bark bearing 

 near the base hard-corky prickles 1.5-3 cm. long, which are sometimes concrescent, form- 

 ing rows of conic or pyramidal elevations, or when young helmet-shaped or conic and sup- 

 porting prickles ; branches rarely armed with a few prickles ; leaves odd-pinnate ; petioles 

 and rachis grooved, narrowly winged, the wings often recurved ; leaflets 7-15, opposite or 

 subopposite, oblanceolate to obovate, elliptic-oblong, or oval, 1.5-7 cm. long, 0.7-2.4 cm. 

 broad, coarsely crenate, rounded and emarginate at the apex, cuneate at the base, in drying 

 often becoming blackish or dark-brown, lustrous above, paler beneath ; pellucid glands 

 scattered or wanting ; staminate flowers : sepals 4, thick, 0.5-0.8 mm. long, glandular- thick- 

 ened on the back, the outer ones semiorbicular, the inner triangular to semioval, narrower ; 

 petals 4, in aestivation cochleate-imbricate, oblong-elliptic to oval, 3-3.5 mm. long, 1-1.4 

 mm. broad, rounded at the apex, rather thick, erect-spreading ; stamens 4 ; filaments 

 longer than the petals ; anthers ovate or narrowly ovate, obtuse to short-apiculate at the 

 apex ; rudimentary carpel conic, tapering into a subulate grooved style ; pistillate flowers : 

 statninodes well developed, filiform ; anthers wanting ; gynophore shortly subconic ; gynoe- 

 cium 1- or 2-carpellary ; ovaries sessile; style somewhat recurved, long-persistent; stigma 

 capitate ; follicles globose to obovoid, 5-7 mm. long, stipitate or subsessile, with or without 

 an apiculation on the side near the apex ; seeds globose or nearly so, 3.5-5 mm. in diam- 

 eter, black, shining. 



Type locality : Maria Madre Island, Tres Marias, Mexico. 



Distribution: Jamaica, Maria Madre, and Socorro islands; also in northern and western 

 South America. 



23. Zanthoxylum Culantrillo H.B.K. Nov. Gen. & Sp. 6 : 2. 1823. 



Fagara inermis Willd.; R. & S. Syst. Veg. Slant. 3: 227. 1827. 



Fagara Culantrillo Krug & Urban ; Urban, Bot. Jahrb. 21 : 574. 1896. 



Fagara Culantrillo continentalis Krug & Urban ; Urban, Bot. Jahrb. 21 : 574. 1896. 



A more or less hirsutulous shrub or small tree with grayish branches ; leaves odd- 

 pinnate ; petioles and rachis grooved, narrowly winged, the wings often incurved ; leaflets 



