MEXICAN AND CENTRAL AMERICAN UMBELLIFER^ I57 



lets ovate to lanceolate, 8 to 15 dm. long, 3 to 7 cm. wide, long-acu- 

 minate, rounded and slightly oblique at base or the terminal ones 

 slightly cuneate, somewhat irregularly serrate ; inflorescence branch- 

 ing, leafy; peduncles short, 3 to 6 cm. long; involucre of a long linear 

 bract; involucel of several linear distinct bractlets as long as the pedi- 

 cels or nearly so; rays numerous, 10 to 25 cm. long; carpels 6 mm. 

 long, glabrous. 



Tepic : in the foothills of the Sierra Madre between Acaponeta and 

 Pedro Paulo, Rose 1936, 1937 (type), August 2, 1S97. 



Sinaloa : near Colomas, Rose 1814, July 14, 1897. 



3. Coulterophytum pubescens C. & R., sp. nov. 



Stems tall (13 to iS dm. high), wxak, much branched ; leaves large, 

 once to twice ternate then pinnate; leaflets lanceolate, 8 to 15 cm. 

 long, acuminate, oblique at base, dark green above, pale and puberu- 

 lent beneath, the margin crenate and apiculate; upper leaves opposite, 

 simple, linear to lanceolate; inflorescence much branched ; peduncle 

 6 to 10 cm. long; rays numerous, nearly equal, 2 to 3 cm. long, 

 puberulent; involucel of several linear short bractlets; pedicels 4 to 7 

 mm. long; ovary densely puberulent; fruit 10 mm. long. 



Jalisco : on the tableland between Colotlan and Bolanos, Rose 2863, 

 September 8, 1897. 



4. Coulterophytum brevipes C. & R., sp. nov. 



Herbaceous (?), 9 to 15 dm. high; radical leaves 2 or 3, 9 to 12 

 dm. long (including the petiole 3 to 6 dm. long), 4 to 5 times ternate ; 

 leaflets obliquely lanceolate, 5 to 12.5 cm. long, rounded or somewhat 

 cuneate at base, sharply serrate, acuminate, slightly scabrous on the 

 margin and veins beneath; inflorescence somewhat irregular; pe- 

 duncles 5 to 15 cm. long; rays nearly equal, 2.5 to 5 cm. long; pedi- 

 cels very short, less than 2 mm. long; fruit 10 mm. long; carpophore 

 4-parted. 



Moi-elos: on bluff of barranca above Cuernavaca, altitude 1950 

 meters, Pr ingle 6390, July 30, 1896. 



This species differs from C. laxtan in the shape of leaflets, more 

 acaulescent habit, and shorter pedicels, as well as in its remarkable 

 carpophore. 



37. MYRRHIDENDRON C. & R. Bot. Gaz. 19: 466. //. 32. 



1894. 



A monotypic genus, found as yet only from the lava beds of Costa 

 Rica. In addition to the original material collected by Mr. John 

 Donnell Smith we cite the following : 



Myrrhidendron donnellsmithii C. & R. 1. c. 



Costa Rica: Pittier 2012, June 2, 1890. 



