542 
48 
48. 
48. 
48. 
56. 
a7. 
57. 
38. 
38. 
62. 
62. 
62. 
NORTH AMERICAN FLORA [VOLUME 22 
. Gormania Hallii. 
Insert the synonym: Echeveria Brittonit Nelson & Macbr. Bot. Gaz. 56: 476. 1913+ 
Gormania debilis. 
Add the synonym: Echeveria debilis Nelson & Macbr. Bot. Gaz. 56: 476. 1913. 
Gormania oregana. 
Add the synonym: Echeveria oregana Nelson & Macbr. Bot. Gaz. 56: 476. 1913. 
Gormania laxa. 
Insert the synonym: Echeveria Gormanti Nelson & Macbr. Bot. Gaz. 56: 476. 1913. 
Cremnophila nutans. 
Add: ILLustrRaTION: Addisonia pl. 25. 
Rhodiola rosea. 
Add to the illustrations: Britt. & Brown, Ill. Fl. ed. 2, f. 2133; Clements, Rocky Mt. 
Fl. pl. 30, f. 3; G. T. Stevens, Ill. Guide pl. 59, f. 7. 
Rhodiola integrifolia. 
Add the synonym: Sedum integrifolium A. Nelson; Coult. & Nels. Man. 233. 1909. 
Sedastrum Hemsleyanum. 
Add: ILLUSTRATION: Trans. Acad. St. Louis 20: pl. 11. 
Insert: 
2a. Sedastrum pachucense C. H. Thompson, Trans. Acad. St. Louis 20:21. 1911. 
Stems annual, numerous from a root crown, erect or afterwards declined, 12-18 cm. 
long; basal rosettes depressed-globose, containing many leaves; stem-leaves linear-oblong, 
only slightly compressed, standing at right angles to the stem, 1.5-2 cm. long; sepals 
unequal; corolla white, 8 mm. broad, rotate. 
TYPE LOCALITY: Pachuca. Hidalgo. 
DISTRIBUTION: Mountains of Hidalgo. 
ILLUSTRATION: Trans. Acad. St. Louis 20: pl. 10. 
Sedum acre. 
Insert the synonym: Sedum minimum Nieuwl. Am. Midl. Nat. 4:56. 1915. 
Add to the illustrations: Britt. & Brown, Ill. Fl. ed. 2. f. 2136; G. T. Stevens, Ill. 
Guide pl. 58, f. 6. 
Insert: 
2a. Sedum potosinum Rose, Contr. U. S. Nat. Herb. 13: 300. 1911. 
Stems low and weak, at first erect, but soon prostrate or at most ascending. Leaves 
closely set, ascending, nearly terete, obtuse, 6-8 mm. long, pale-green, glabrous, slightly 
glaucous; inflorescence (usually?) an equilateral raceme; pedicels short, 1-2 mm. long; 
sepals linear, distinct nearly to the base, 3 mm. long; petals white or slightly tinged with 
pink, widely spreading, 6-7 mm. long. 
TYPE LOCALITY: Near San Luis Potosi, San Luis Potosi. 
DISTRIBUTION: San Luis Potosi. 
Insert: 
4a. Sedum mellitulum Rose, Contr. U. S. Nat. Herb. 13: 299. 1911. 
Small, compact, much branched at base, the individual stems at first erect and nearly 
simple or in age becoming decumbent, very slender, pinkish, glabrous but slightly rough- 
ened; leaves scattered, standing nearly at right angles to the stem, terete, blunt, glabrous, 
6-8 mm. long, bright-green; inflorescence an open spreading cyme of 2 or 3 branches, each 
branch bearing 3-8 flowers; pedicels short (about 2 mm. long); sepals nearly or quite 
distinct, linear, 3-4 mm. long; petals a little longer than the sepals, widely spreading, 
white; filaments white; anthers brownish; pistils white, erect; mature carpels erect. 
TYPE LOCALITY: In the Sierra Madre, west of Colonia Juarez, Chihuahua. 
DISTRIBUTION: Chihuahua. 
ILLUSTRATION: Contr. U. S. Nat. Herb. 13: pl. 37. 
