Mackenzie and Bush — New Plants from Missouri. 81 



son and other American botanists, by its smaller pedicelled 

 flowers. 



Specimbxs EXAMINED. — MISSOURI; Type specimens as cited under type 

 locality; Adams, Jackson County, K. K. Mackenzie, 159, June 12, 1898; 

 Greenwood, Jackson County, K. K, Mackenzie, June 11, 1899; Glendale, 

 Jackson County, K. E. Mackenzie, 158, June 12, 1898.— Kansas: Rosedale, 

 Wyandotte County, K. K. Mackenzie, July 12, 1896. — Illinois: Carlinville, 

 Macoupin County, W. G. Andrews, June 15, 1891, March 80, 1892, August 

 13, 1892. 



PORTULACA NEGLECT A n. sp. 



Annual, of robust growth, forming broad tufts, mostly 

 5-10 dm. wide; stems mostly ascending, large and thick, 

 sometimes 12 mm. thick; leaves large, obovate-spatulate, 

 25-50 mm. long, and 12-25 mm. wide at widest part, mostly 

 retuse or obtuse at apex, thickish, but equally thick across 

 leaf ; flowers beginning to appear about the first of August, 

 opening in direct sunshine about 7:40 a. m., large for the 

 section, 8-12 mm. wide; petals oblong, clear yellow, deeply 

 cleft; sepals in bud large, ovate-oblong, acute or obtusish, 

 carinate-winged at top; stamens numerous, from 12 to 18; 

 style scarcely any; stigmas long, plumose, 5- or 6-parted; 

 capsule large, 8-12 mm. long; seeds minutely, but under a 

 lens distinctly, tuberculate, .7 mm. long, and .6 mm. wide, 

 blackish when mature. 



Type locality : Courtney, Jackson County, Missouri ; col- 

 lected by B. F. Bush, 1148, Aug. 24, 1900; type in Herb. 

 Missouri Botanical Garden. 



This species is abundant in bottoms along the Missouri 

 River, and on rich prairies in Missouri and Kansas, and prob- 

 ably elsewhere. It takes the place in greater part of what 

 has been passing for P. oleracea L. in Missouri, Kansas and 

 Arkansas, and is very likely what has been taken for P. retusa 

 Engelm., in Minnesota, Missouri and Kansas. It is easily 

 distinguished from P. oleracea L., by its larger size, larger 

 and broader, thinner leaves, more numerous stamens, differ- 

 ent time of flowering, and its upright or ascending stems. 

 Where the two grow together, P. oleracea L. opens its flowers 

 about 9 : 30 A. m. From P. retusa Engelm., it is distinguished 

 by its thicker leaves, larger flowers, and its smaller seeds. 



