98 



MISSOURI BOTANICAL GARDEN, 



occasional hairs on the stout midribs, and prominent primary veins 

 ncctcd by conspicuous cross veinlets, 6-8 cm. long and 5-6.5 cm. wide; 

 petioles stout, slightly wing-margined at the apex, densely villose while 

 young, becoming glabrous, rose color toward the base in the autumn, 2.5-3 

 cm. in length; leaves on vigorous shoots rather thicker and often 12-14 

 cm. long and 10-12 cm. wide. Flowers 2-2.2 cm, in diameter, on short 

 slender slightly hairy pedicels, in compact mostly 7-10-liowcred corymbs, 

 with large oblong-obovate to linear-obovate glandular bracts and bractlcts 

 mostly persistent until the flowers open, the elongated lower peduncles from 

 the axils of upper leaves; calyx-tube broadly obconic, the lobes gradually 

 narrowed from w^ide bases, short, acute, laciniately glandular-serrate, 

 glabrous on the outer, villose on the inner surface, reflexed after anthesis; 

 stamens 20; anthers white; styles 3-5, surrounded at the base by a broad 

 ring of pale tomentum. ' Fruit ripening early in October, on short drooping 

 red glabrous pedicels, in few-fruited clusters, subglobosc, dull green tinged 

 with red, 1.2-1.4 cm. in diameter; calyx prominent, with a short tube, a 

 broad shallow cavity tomentose in the bottom, and deciduous lobes; flesh 

 thin, dry and hard; nutlets 3-5, usually 5, narrowed and rounded at the 



igul 



4-4 



d 



A tree 7-8 m. high, with a tall trunk 1-1.5 

 covered with dark scaly bark, large ascending and 



oblone irre2ular 



branchlet 



med 



they first appear, becoming light chestnut 

 and marked by small pale Icnticels in i 

 lighter-colored the following year, and a 

 stout nearly straight purple shining spines 2-3.5 cm. long. 



Wooded hillsides, near Barrett's Station, St. Louis County, 

 J. H. Kellogg, (No. 9 A type) May 9, 1902, May 4, 1905, 

 April 14, and September 28, 1907. 



Mackenzii 



Man 



I 



Glabrous with the exception of the hairs on the young leaves. Leaves 

 ovate, acute, rounded, abruptly cuneate or truncate at the broad base, 

 sharply often doubly serrate, with straight glandular teeth, and slightly 

 divided into 3 or 4 pairs of narrow acuminate lateral lobes; deeply tinged 

 with red when they unfold, more than half-grown when the flowers open 

 about the 1st of May and then thin, yellow-green and slightly hairy above 

 and pale and glabrous below, and at maturity thin, dark blue-green, smooth 

 and lustrous on the upper surface, pale bluish green on the lower surface, 

 5-6 cm. long and 4.5-5 cm. wide, with slender yellow midribs, and thin 



primary veins; turning scarlet in the autumn; petioles slender, slightly 



