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TREES AND SHRUBS. 



CEAT^GTTS TRIANTHOPHOEA, Sabg. 



(Uniflorse.) 



US TRIANTHOPHORA, U. Sp. 



/es oblong-obovate, rounded or acute at the apex, gradually narrowed to the cuneate base, 

 jarsely serrate above the middle, with spreading or slightly incurved glandular teeth ; more 

 half grown when the flowers open and then thin, yellow-green, very lustrous and coated 

 : with short soft white hairs, and paler and villose below, especially on the midribs and veins, 

 at maturity thin, dark yellow-green, lustrous and scabrate on the upper surface, pale bluish 

 m and still villose on the lower surface, from 2.5 to 4 centimetres long and from 1.5 to 2 

 timetres wide, with stout midribs, and very slender primary veins extending obliquely to the 

 points of the lobes ; petioles slender, wing-margined to below the middle, tomentose early in the 

 season, becoming pubescent or nearly glabrous, from 4 to 5 millimetres in length. Flowers from 

 1.4 to 1.6 centimetres in diameter, on stout hoary-tomentose pedicels, in two or usually three- 

 flowered tomentose mostly simple corymbs, with lanceolate to linear glandular caducous bracts 

 and bractlets ; calyx-tube narrowly obconic, covered with pale hairs most abundant toward the 

 base, the lobes foliaceous, long, acuminate, laciniately glandular-serrate, villose, reflexed after 

 anthesis; stamens twenty; anthers pale yellow; styles three or four. Fruit generally solitary, 

 on erect pubescent reddish stems, obovate, full and rounded at the apex, abruptly narrowed at 

 the base, light orange-red, very lustrous, marked by large pale dots, from 1.2 to 1.4 centimetres 

 long and from 1 to 1.2 centimetres in diameter; calyx prominent, with a wide deep cavity, and 

 much enlarged spreading and appressed coarsely serrate villose persistent lobes; flesh thick, 

 yellow, dry, and mealy ; nutlets three or four, acute at the ends, rounded and slightly grooved on 

 the back, from 6.5 to 7.5 millimetres long and from 4.5 to 5 millimetres wide. 



A shrub, from 6 to 12 decimetres high, with numerous stems, and very slender nearly straight 

 branchlets thickly clothed with hoary tomentum when they first appear, becoming dark reddish 

 brown, pubescent, verrucose and marked by small dark lenticels in their first season and light 

 reddish brown the following year, and armed with very numerous thin straight purplish spines 

 from 3 to 4 centimetres long. Flowers appear about the 10th of May. Fruit ripens the middle 

 of October. 



Dry open woods near Grandin, Shannon County, Missouri, C. 8. Sargent, September 30, 

 1900 (No. 4), B. F. Bush, May 7 and October 12, 1905 (No. 12 type), May 8 and October 11, 

 1905 (Nos. 12 A and 12 B) ; along gravelly benches, Pleasant Grove, Shannon County, Missouri, 

 B. F. Bush, August 12, 1899 (Nos. 463 and 465), May 20, 1900 (No. 349). 



This species belongs to a small group of low shrubs which is chiefly confined to the Atlantic states from New York 

 to Florida, a few of the species appearing also in northern Alabama. In the region west of the Mississippi River the 

 described UnifloraB have been represented only by a single plant found near Dallas, Texas, by Mr. J. Reverchon 

 (Nos. 26 and 34), May 28, 1901, without flowers. This has been referred to Crataegus uniflora, Moench, but I suspect 

 thaHt'is the same as this southern Missouri species. This differs from Cratcegus uniflora in its obovate orange-red 

 fruits, and in its usually three-flowered corymbs, the flowers of Cratcegus unijiora being generally solitary or occa- 

 sionally in pairs. Cratcegus trianthophora is more closely related to Cratcegus gregalis, Beadle, of the elevated regions 

 of western North Carolina, but this species differs from the Missouri plant in its smooth usually narrower leaves, in 

 its fewer-flowered hoary-tomentose corymbs, narrow-obovate yellowish fruits, and in its stouter branches and spines. 1 



1 A specimen in the Gray Herbarium collected by Fendler at Camden, Arkansas, in 1850, with flowers and immature fruits, 

 looks a good deal like this Missouri plant, but the flowers are solitary. 



