MEXICAN AND CENTRAL AMERICAN UMBELLIFER^ 



123 



sessile 

 mostly 



and only subtending the inflorescence, similar to the basals, but 

 and smaller; scape or flower-bearing stem 15 to 22.5 cm. high, 

 bearing 3 bibracteate peduncles, 

 rarely i to 4 ; heads small, sub- 

 globose, without the bracts 6 to 

 10 mm. in diameter; involucre 

 of 9 to 12 stellately divaricate, 

 thick, rigid, oblong-lanceolate 

 or oblanceolate bracts, 12 to 18 

 mm. long, mostly entire, some- 

 times with I to 4 teeth, aculeate 

 at apex, white above and at mar- 

 gin ; involucels of rigid bractlets, 

 linear-oblong from a broadish 

 base, scarcely acute, a little ex- 

 ceeding the flowers ; calyx-teeth 

 ovate, apiculate or scarcely acu- 

 leate ; carpel (immature) with 

 two forms of scales, those above 

 larger, lanceolate, erect, the others 

 papilliform ; styles sub-erect. 

 Tepic : between Dolores and 



Santa Gertrudis, Rose 2035, 



August 7? "^"^^l '1 '" ^he 



Sierra Madre near Santa 



Teresa, Rose 3456, August 



13, 1897. 

 Zacatecas : east range of the 



Sierra Madre, Rose 3526, 



August 17, 1897. Fig. 3. Erjngium rosei. 



Eryngium spiculosumHemsl. in Hook. Icon. IV. 6 : pi. 2^oy. 1897. 



Plate III c. 



Stem erect, apparently 4.5 to 6 dm. high, slender, dichotomously 

 much branched above, glabrous throughout ; lower leaves not seen ; 

 upper leaves about sessile, glabrous, thin, palmately divided, the 

 largest 11 cm. long, often 3-lobed, sometimes a few small basal lobes 

 in addition, spinose-dentate, the spines not rigid ; heads numerous, 

 distinctly slender-peduncled, ovoid or subglobose, 6 to 10 mm. long 

 without the terminal tuft which is of rigid bractlets 2.5 cm. long or less ; 

 involucre of 5 to 8 rather rigid, linear-lanceolate bracts, 12 to 24 mm. 

 long, spinose-acuminate, mostly entire, or sometimes with i or 2 teeth 

 below the middle ; involucels of subulate rigid bractlets exceeding 

 the flowers; flowers distinctly pedicelled ; calyx-teeth scarious, ovate, 

 apiculate; carpels scarcely 1.5 mm. long, oblong, almost terete, very 

 densely clothed with minute branching spicules; oil-tubes often 9, 

 rather conspicuous; styles much exceeding the calyx- teeth, divaricate. 



Michoacan : Hahn. 



Morelos : Miacatlan, Altamirano 18, December 1875. 



