Part 3, 1911] SIMAROUBACEAE 231 



Branches and lower leaf surfaces not hoary pubescent. 



Leaf-blades copiously fine-pubescent and dull, velutinous. 4. C. peninsularis . 



Leaf-blades glabrous or inconspicuously pubescent, but shining, not velu- 

 tinous. 

 Branches ending in branched thorns. 



Leaf-blades very thick, strongly revolute, glabrous, stout-petioled. 5. C.jacquiniifolia. 

 Leaf-blades thinnish, nearly flat, finely pubescent, slender-petioled. 6. C. erecta. 

 Branches not thorny or with occasional simple thorns. 



Leaf-blades thin-margined ; petiole and midrib beneath with ap- 



pressed hairs. 7. C. Brittonii. 



Leaf -blades thick-margined ; petiole and midrib beneath with spread- 

 ing hairs. 8. C.macrophylla. 



1. Castelaria Nicholsoni (Hook.) Small. 



Caslela Nicholsoni Hook. Bot. Misc. 1 : 271. 1830. 



A much-branched, often slender thorny shrub with hoary-tomentulose branches and 

 twigs, the thorns often partially glabrous. Leaf-blades elliptic or oblong, varying to ovate 

 or obovate, mostly 1-2 cm. long, obtuse or abruptly pointed, bright-green and nearly 

 glabrous above, hoary-tomentulose and somewhat veiny beneath, abruptly narrowed or 

 rounded at the base, sessile or nearly so ; flowers short-pedicelled ; sepals triangular-ovate, 

 pubescent; petals broadly obovate, yellowish or purplish, about 2.5 mm. long; drupes 

 red, much flattened, 1 cm. long or less, slightly reticulate. 



Type locality : Antigua. 

 Distribution: Antigua and St. Croix. 

 Illustration: Hook. Bot. Misc. 1 : pi. SJ. 



2. Castelaria texana (T. & G.) Small. 



Caslela Nicholsoni texana T. & G. Fl. N. Am. 1 : 680. 1840. 

 Cask-la texana Rose, Contr. U. S. Nat. Herb. 12 : 278. 1909. 



A copiously branched usually slender thorny shrub with hoary-velutinous branches and 

 twigs, the thorns often glabrous near the tip. Leaf-blades narrowly oblong or linear, vary- 

 ing to spatulate or lanceolate, mostly 0.5-1.5 cm. long, acute or abruptly pointed, bright- 

 green and glabrous or nearly so above, hoary-tomentulose and scarcely veiny beneath, short- 

 petioled or nearly sessile ; flowers short-pedicelled ; sepals deltoid, slightly pubescent ; 

 petals narrowly obovate, reddish-purple or somewhat orange, fully 3 mm. long; drupes 

 red, flattened, 6-8 mm. long, coarsely reticulate. 



Type locality : Texas. 



Distribution : Southern Texas and northern Mexico. 



Illustration : A. Gray, Gen. 111. pi. US,/. 1-7, 9-12 (as Castela Nicholsoni). 



3. Castelaria tortuosa (L,iebm.) Small. 



Castela tortuosa Liebm. Vidensk. Meddel. 185.5 : 108. 1S54. 



A much-branched, often irregular, usually minutely thorny shrub with hoary-pubescent 

 branches and twigs, the thorns often glabrous at the tip. Leaf-blades oblong, or slightlv 

 broadest above the middle, varying to ovate, mostly 1 cm. long or less, entire, bright-green 

 and glabrous or nearly so above, hoary-tomentulose and veiny beneath, very short-petioled ; 

 flowers short-pedicelled ; sepals deltoid, sparingly pubescent ; petals broadly obovate, red- 

 dish-purple, about 2.5 mm. long ; drupes not seen. 



Type locality : Tehuacan. 

 Distribution : Puebla. 



4. Castelaria peninsularis (Rose) Small. 



Caslela peninsularis Rose, Contr. U. S. Nat. Herb. 12 : 278. 1909. 



A much-branched, decidedly thorny shrub, with yellowish-velutinous branches and 

 twigs, the thorns partially glabrous near the tip. Leaf-blades oblong, obovate, or cuueate, 

 1-2 cm. long, rounded or truncate and mucronate at the apex, velutinous, especially 

 beneath, entire, undulate, or shallowly toothed, markedly petioled ; flowers decidedly pedi- 

 celled on the short inflorescence-rachis ; sepals broadly deltoid, finely pubescent and ciliolate ; 

 petals oblong, red, 3 mm. long; drupes not seen. 



Type locality : Sau Jose del Cabo, Lower California. 

 Distribution : Known only from the type locality. 



