176 riDt<' Andmrseae. 



base rounded or somewhat cuneate, entire or minutely serrate ; the upper 

 half incisely and coarsely toothed with finer serrations on the teeth which 

 are slightly calloused but not glandular, scatteringly ciliate-pubescent 

 above, nearly glabrous beneath except on the midrib and primary veins 

 which are noticeably ciliate-pubescent or hirsute, even at maturity ; nearly 

 full size when the flowers open; petioles moderately stout, short, rarely 

 more than one-fourth or one-third as long as the blade ; bark of the 

 branches gray, irregularly furrowed and checked, with few r rather large 

 lenticels ; the stoutish twigs glossy-brown (some of the young foliar twigs 

 slender and green) ; thorns rather few, often nearly wanting on some 

 branches, glossy brown, very variable as to length (3-5 cm.), straight or 

 slightly decurved ; corymb many flowered (10-20) broad or flat-topped, the 

 pedicels hirsute-pubescent, rather slender, 1-3 cm. long; calyx tube very 

 short, hirsute, its narrow lobes cut into long slender nearly cylindrical 

 gland-tipped teeth ; petals orbicular, about 8 mm. in diameter, crenately 

 toothed ; stamens 10, about 5 mm. long; styles stout, mostly three, rarely 

 2 or 4; the mature fruit large, 10-13 mm. in diameter, dark scarlet-red, 

 tipped with the persistent calyx-lobes and filaments, the pulp juicy and 

 well flavored, the 2-4 (mostly 3) nutlets rather large, slightly ridged on the 

 back. 



Mr. Andrews writes as follows of this species : " Both in flower and in 

 fruit it is the most beautiful of the thorns which are native in this part 

 of Colorado, and will compare favorably, I believe, with any American 

 species. The type locality is Gregory Canon, growing with Crataegus 

 cerronis. It is a low well-branched tree but rather more open than other 

 sorts, about 10-12 feet tall, isolated specimens being very well rounded 

 and symmetrical." 



I know of no western species to which this is closely allied. What is 

 probably the same thing (flowering specimens) was distributed by Cran- 

 dall from the foot-hills near Fort Collins, 1898, as C. coccinea macrantha. 

 Apparently from the same collection by Crandall is No. 4,151, Horsetooth 

 Gulch, May 28, 1898, distributed by the N. Y. Bot. Gard., unnamed. I 

 have it also from R. T. Young, of Boulder, in 1903, these specimens in 

 blossom and later ones with immature fruit; again from the same collec 

 tor in 1904, with nearly mature fruit. Mr. Andrews' specimens, flowers 

 and mature fruit, are taken as the type. 



Crataegus cerronis A. Nelson. 



Crataegus cerronis A. Nels. Bot. Gaz. 34 : 370. 



Since the above was published this species has been collected by L. N. 

 Goodding at Slater, Colo., 1903. Excellent specimens are also at hand from 

 Mr. Andrews. These specimens show some points that had to be omitted 

 from the original description, viz. : fruit black, mostly less than 1 cm. in 

 diameter, the amount of pulp small ; carpels usually dissimilar, some of 

 them being laterally flattened. 



