[ From the Botanical Gazette. Vol. XIX. Page 466.] 



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New genns of Umbelliferae.— with plate xxxii.— Mr. John Donnell 

 Smith has recently sent us from his last collection in Central Amer- 

 ica a new genus of Umbelliferae. This is a raost pecuh"ar plant, not 

 closely related to any known genus, nor is it easily referred to any 

 tribe. It becomes a small tree fifteen feet high and is the only arbor- 

 escent species which we have seen from North America. Only two 

 plantswere seen,growing at an altitude of 10,200''^ and constituting the 

 highest vegetation on the volcano. 



^ This is the third genus of Umbelliferse that has been brought to 

 hght by Mr. Smith in Central America. We have previouslyreported 

 upon Guatemalan Umbelliferae in this journal 

 ber, 1890, and February, 1893. 



MyiThklendroii, genus nov.— Calyx teeth obsolete. Fruit linear, 

 flattened dorsally, glabrous, shining. Carpels strongly flattened dor- 

 sally; dorsal and intermediate ribs lovv; lateral ribs narrow-winged. 

 Stylopodium low conical. Oil-tubes solitary in the intervals, two on 

 the commissural side. Seed stron^ly flattened dorsally, with a flat 

 face and furrowed under the oil-tubes.— Arborescent. Leaves large, 

 decompound; leaflets ovate. Flowers white. 



A peculiar genus, with fruit of the shape and texture of M/rr/iis hut 

 differently flattened. The carpels are flattened as in Frurrda/recebut in 

 other respects unlike that tribe. 



Myrrliidendron DonneJlsniitlui sp. nov.— A small Vree 3.6 to 4.8'° 

 high; trunk y.s""»" in diameter; leaves large, 30*^'" or more long, ter- 

 nately compound; leaflets ovate to lanceolate, 2.5 to 5.0'""' long, acute, 

 sharply and often irregularly serrate, the teeth more or less mucron- 

 ate-tipped, glabrous, shining and impressed veiny above, dull and 

 paler beneath and conspicuously reticulate; petiolules with a promi- 

 nent stipular ring which is more or less glandular tufted; petioles 

 large, inflated: peduncles short: involucre few-leaved; involucels nu- 

 merous, 3- lo 4-toothed or cleft near the apex, scarious margined and 

 strongly purplish veined: inflorescence more or less glandular puber- 

 ulent; rays numerous, rarely equal; pedicels 8 to 10""" long: fruit lin- 

 ear, 10 to 12""" long, glabrous. — From the lava beds at the summit of 

 the volcano Irazii in the province of Cartago, Costa Rica, March, 

 1894 (no. 4,825).— JoHN M. CouLTER aud J. N. Rose, Lake Foresf, IIL 

 and Washingtony D, C 



