Mackenzie and Bush — New Plants from Missouri. 83 



with whom one of the writers has been associated in the 

 study of some interesting species. 



The type specimens are the only ones known. 



Prunus lanata (Sudw.) McK. & Bush. 



P. Americana /3 mollis T. & G. Fl. N. A. 1 : 407. (1840), not P. mollis 



Torr. Fl. (1824). 

 P. Americana lanata Sudw. Bull. No, 14, Jan. 21, 1897. 



A shrub or sometimes a laroje tree with a maximum height of 

 about 9 meters and a diameter of about 4 dm. ; branches very 

 thorny; bark thick; leaves ovate to lanceolate, sharply and 

 often doubly serrate ; young twigs, pedicels, and both sides 

 of the entire calyx-lobes densely short appressed-pubescent ; 

 leaves strongly pubescent below even at maturity, petioles 

 biglandular near the blade; flowers white, 10-20 mm. broad, 

 appearing in lateral sessile umbels before the leaves ; pedicels 

 10-18 mm. long, densely appressed-pubescent; calyx-lobes 

 entire, densely pubescent without and within; drupe globose, 

 red or purple, 12-18 mm. in diameter, the skin tough, with a 

 decided bloom, the stone somewhat flattened, its ventral edge 

 acute, the dorsal grooved. Common along rivers and bottoms 

 from Illinois and Iowa to Missouri, Texas and Mexico. 



This species seems to us to differ very much from P. Ameri- 

 cana Marsh., in its greater pubescence, its calyx-lobes pubes- 

 cent on both sides, and in the appressed pubescent pedicels. 



Specimens examined. — Missouri : Fairmount Park, Jackson County, 

 Mackenzie, 15, April 24, 1898; Dodson, Jackson County, Mackenzie, 23, May 

 1, 1898; same locality, Mackenzie, July 17, 1900; Independence, Jackson 

 County, Bush, 274; June 7, 1895; St. Louis County, Engelmann, June, 

 1877. — Iowa: Muscatine, ilfacA;ensie, 362, May 13, 1893; Iowa City, ^ifcA • 



cock Illinois: Dupage County, Moffatt, April 26. 1896. — Arkansas: 



Frescott, Bush, 184, April 25, 1901.— Texas: Marshall, Bush, 621, Aug. 8, 

 1901; San Antonio, 5hs/i, 796, Sept. 16, 1901. 



Hypericum pseudomacdlatum, n. sp. B. F. Bush. 



An herbaceous perennial from a woody base, erect, 4-9 

 cm. high, more or less black-dotted. Leaves sessile, or 

 mostly clasping by a broad cordate base, oblong or oblong- 

 lanceolate, obtuse, or the upper mostly acute, 25-40 mm. 

 long, 7-15 mm. wide, copiously punctate with pellucid glands, 

 and sparingly black-dotted ; cymes terminal, many-flowered 



