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ROSK MEXICAN AND CEXTHAL AMERICAN PLANTS. 



127 



Echinocactus pringlei (Coulter) Roge. 



Edunocactas pUo^iiis J yringlei Coulter, Contr. Nat. Herb. 3: 365. IS90. 



This apecies is very distinct from the true E. pifoms: Botli are under cultivation 

 in Washington. 



API ACE AE, 



INTRODUCTORY NOTE. 



In 1905 was published a sui>plcment^* tu Coulter and Rose's Synopsis 

 of the Mexican and Central American Umbclliferac, During tlie past 

 year so many new species have been found and so nuu-h interostiTig 

 material has come to hand that it seems best to publish the notes and 

 descriptions* 



ARRACACIA, NEW AND OLD SPECIES. 



Arracacia aegopodioides Coulter & Kosc. 



Collected by J. N. Rose and Jos. II. Painter, in oak woods })ctwcon Pachuca and 

 Real del Monte, Ilidulgo, July 19, 1905 (no. 8G71); on Sit^rra de Pachuea, Hidalgo, 

 July 20, 1905 (no. 8853); between Somoriel and Las Lajas^, Ilidal^^o, August 5, 1905 



(no. 9201). 



Arracacia fruticosa Rose, sp. nov. 



A meter or more hi|^di, the stem woody, at least often so, the herbaceous parts 

 puritlish and more or less glaueuus, glabrouy; basal and lower stem loaves ternately 

 decompound, 30 to 40 cm. long, tlie ultimate segments? small, ovate to lanceolate^ 

 sharply toothed or more or lesH cleft, glabnjuH; upper stem leaves nmeh reduced; 

 inflorescence much compounded, the rays often forming umbel-like eluaterrt and 

 thetie Bometimes again compoumled; rays 15 cm. or less long; involucre bracts and 

 invulucel bractleta wanting; but tlie top and base of the rays grannlate; rays mimer- 

 ons, about equal, 3 to 4 cm. long; pedicels o mm. Icmg; flowers deep puri)le; fruit 

 10 mm. long, smooth; carpels strongly 5-angled; seed deeply concave on the face; 

 mid<lle interval containing a single oil tube, the lateral intervals sometimes witli two; 

 carpophores broad and thin; stylopodia small but conical. 



Type r. S. National IIerl>arium no. 453625, collected by J. N. Rose and J. II. 

 Painter near the base of tlie red hills east of Tehuacan, Puebla, September 0, 1905 

 (no. 10125). In habit and especially in its fnitescent stem tins .species resembles 

 the genus Coulterophytum, but it lias the fruit of a true Arracacia. 



Arracacia multifida P. Wats. 



Collected by J. N. Rose and Jos. II. Painter, near Tuluucingo, Hidalgo, July 22, 

 1905 (no. 8834); on limestone hillside near Ixmiquilpaii, Hidalgo, July 29, P*05 



(no. 9048). 



Arracacia tenuifolia Rose, sp. nov. 



Stems 25 to 35 cm. tall, glabnjus througliont, somewhat branched above, naked 

 below; basal leaves large, ternately decompounded into linear, elongated, entire 

 segments; peduncles slender, S to 10 cm. long; rays few (3 to 10), stout, 1 to 1.5 cm. 

 long; involucel bractlet^ several, minute, shorter than the pedicels; peilicels short, 

 1 to 1.5 mm. long; fruit ovate, 4 mm. long; stylopodia slender-conical. 



Type U. S. National Herbarium no. 453208, collected by J. N. Rose and Jos. 11. 

 Painter on a ledge of a high cliff near Cadereyta, Queretaro, August, 1905 (no. 9719). 



This species is near A. muUifida, but has smaller and differently shaped fruit, etc. 



a^Rose. Contr. Nat. Herb, 8: 331. 1905. 



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