Part 3, 1911] RUTACEAE 181 



paler beneath, when young thinly velvety, less so in age, or glabrate, sessile or short- 

 petiolulate ; pellucid glands usually small, scattered, those between the teeth larger ; flowers 

 in small, sessile, axillary cymes on the branches of the previous season, usually appearing 

 before the leaves; staminate flowers: calyx wanting; petals 4 or 5, greenish or greenish- 

 yellow, oblong to oval, occasionally obovate, 2.5-3 mm. long, 1-1.5 mm. broad, fringed at 

 the tip ; stamens 4 or 5, equaling or longer than the petals ; anthers elliptic to ovate ; ovary 

 rudimentary; styles wanting; pistillate flowers: calyx wanting; petals oblong to oval, 

 fringed at the tip ; gynoecium 2-5-carpellarv ; styles rather long ; stigmas capitate ; follicles 

 ellipsoid, 4-6 mm. long, grayish or brownish, stipitate, glandular, the surface wrinkled or 

 pitted ; seeds ovoid, 4-5 mm. long, black, shining, more or less wrinkled. 



Type locality : Pennsylvania. 



Distribution : Quebec and Ontario to Minnesota, Georgia, Alabama, and Oklahoma. 



Illustrations: A. Grav, Gen. 111. 2: pi. 156, f. 1-11; Britt. & Brown, 111. Fl. f. 2269 ; 

 Millsp. Am. Med. PI. 1: pl.35; Bigel. Am. Med. Bot. 3 : pi. 59 ; Schkuhr, Handb. 4 : pi. 323 b, 

 f. B ; E. & P. Nat. Pfl. 3< : /. 65, a-g ; Mem. Mus. Paris 12 : pi. 25, f. 3S, b; C. K. Schneider, 

 Handb. Laubh. 2 : /. 74, a-i. 



2. Zanthoxylum ferrugineum Radlk.; Dorm. Smith, 

 Bot. Gaz. 24: 391. 1897. 

 An apparently unarmed tree with a grayish bark, the young parts clothed with dense, 

 fugacious, ferruginous wool, the hairs jointed, few-branched or fasciculate-stellate ; leaves 

 odd-pinnate, crowded near the ends of the branchlets, about 24 cm. long and 8-12 cm. broad ; 

 leaflets 13-17, opposite or nearly so, subsessile, oblong to ovate-oblong, 4-6.5 cm. long, 

 2-2.5 cm. broad, membranous, acute to acuminate at the apex, inequilateral at the base, nearly 

 entire, or crenate and bearing large glands in each sinus, beneath densely and minutely 

 pellucid-glandular; panicles densely flowered, 6-10 cm. long, woolly-pilose; staminate 

 flowers unknown ; pistillate flowers : pedicels short, often bearing rudimentary flowers at 

 the base instead of bractlets ; sepals wanting; perianth-segments 9 or 10, linear, 2-3 mm. 

 long ; disk short, glabrous ; ovary sessile on the disk, gibbous, obovoid, convex on the 

 back, tapering into an eccentric columnar style, tomentose with forked or fasciculate 

 stellate hairs, glandular ; stigma depressed-capitate. 



Type locality : Near Alajuela, [Costa Rica]. 

 Distribution : Known only from the type locality. 



3. Zanthoxylum taediosum A. Rich. Ess. Fl. Cuba 330. 1842. 



Zanthoxylum ternatum A. Rich. Ess. Fl. Cuba 330. 1S42. Not Z. ternatum Sw. 1797. 



Tobinia ternata ? taediosa Griseb. Cat. PI. Cub. 4S. 1866. 



Fagara stenoptera Griseb. Cat. PI. Cub. 48. 1866. 



Zanthoxylum sienopterum Wright; Sauv. Anal. Acad. Ci. Habana 5 : 287. 1868. 



Zanthoxylum ternatum t taediosum Maza, Anal. Soc. Esp. Hist. Nat. 19: 227. 1890. 



Fagara taediosa Krug & Urban ; Urban, Bot. Jahrb. 21 : 582. 1896. 



A glabrous shrub, 1.5-3 m. high, or sometimes a small tree, the branches brownish 

 or grayish-brown, straight or somewhat flexuous, unarmed or armed, the prickles inserted 

 in pairs or rarely solitary at the bases of the petioles, or on the rachis at the base of the 

 leaflets, occasionally on the midrib on the back of the leaflets ; leaves odd-pinnate, or 

 sometimes equally-pinnate; petioles and rachis winged, or wingless; leaflets 3-7, opposite, 

 sessile, narrowly to broadly obovate, 0.8-2.8 cm. long, 0.5-1.9 cm. broad, obtuse, rounded, or 

 emarginate at the apex, cuneate or occasionally somewhat rounded at the base, nearly 

 equilateral, rigid, entire, above shining, paler and rather dull beneath, the margin often 

 recurved; glands of the lower surface brownish or blackish, more or less impressed; 

 panicles lateral and sometimes terminal, mostly 1 or 2 cm. long ; staminate flowers : calyx 

 about 1 mm. broad ; sepals 3, triangular to nearly orbicular, subacute to rounded at the 

 apex, denticulate or entire ; petals 3, imbricate at flowering time, erect-spreading, elliptic 

 to oval, sometimes ovate to obovate, 1.8-2 mm. long, 1-1.4 mm. broad; stamens 3 ; fila- 

 ments longer than the petals ; anthers ovate or oval ; ovary rudimentary ; style subulate ; 

 stigma wanting; pistillate flowers: staminodes well-developed ; gynophore disk-shaped, 

 crenulate; gynoecium 1-carpellary ; style at first reflexed, at length straightening ; stigma 



