130 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
long ; leaves of flowering branches sessile, linear-oblong, blunt, reflexed, almost 
smooth, shining, J inch long. Inflorescence lax, of a terminal, and short lateral 
cymes. Flowers nearly sessile, white. | inch across. Buds ovate, blunt, with 
strong green ribs. Sepals leaf -like, very fleshy, blunt or bluntly apiculate, 
lanceolate, slightly unequal, wide-spreading. Petals ovate, acute, wide-spreading, 
\ longer than the sepals, slightly greenish white, furrowed down the middle. 
Stamens erect, nearly equalling the petals, the epipetalous ones attached near 
the base, filaments white, anthers pale purple. Scales yellow, linear, twice as 
long as broad, curved upwards, set in a shallow oval dark-green hollow of the 
carpel with a raised lip, giving the appearance of an oval dark-green scale with a 
yellow median portion. Carpels papillose, turgid, very erect, slightly spreading 
later, shorter than the stamens, green, sometimes dotted purple on the edges, 
styles erect, very short. 
Flowers January. Not hardy. 
Habitat. — Mexico : Pachuca, Hidalgo, and apparently elsewhere. 
Plants kindly sent me by Dr. Rose, labelled as 5. Hemsleanum 
Rose, collected in Mexico by C. A. Purpus in 1905, clearly belong 
to the recently described 5. pachucense ; at that time the two species 
had not been separated. 
45. Sedum Hemsleanum Rose. 
5. Hemsleanum Rose in Bull. New York Bot. Gard. 3, 41, 1903. 
Synonym. — Sedastrum Hemsleyanum Rose in "N. Amer. Flora," 22, 58, 1905. 
Illustration. — Trans. Acad. Sci. St. Louis, 20, pi. 11, 1911 (photo). 
Very near the last species, under which the differences between 
the two are indicated. As mentioned under S. pachucense, plants 
received from Washington as Hemsleanum proved to belong to the 
former species ; but according to Thomson {I.e.) both species are in 
cultivation at St. Louis. 
Description. — " Perennial, caulescent, 1-3 dm. high, branching, puberulent. 
Inflorescence an elongated panicle ; flowers sessile, arranged along one side of 
the axes ; calyx-lobes broadly ovate, obtuse. 1.5 mm. long ; petals white, 4 mm. 
long, ovate, acuminate ; carpels 5, tipped with long, slender styles." — Rose, 
loc. ext. 
Flowers winter. Not hardy. 
Habitat. — Mexico. 
46. Sedum ebracteatum M09. and Sesse (fig. 68). 
5. ebracteatum M09. and Sesse ex De Candolle "Memoire CrassuL," 
37, 1828 ; Hemsley, " Biol. Centr. Amer.," 1, 394. 
Synonym. — Sedastrum ebracteatum Rose in " N. Amer. Flora," 22, 59. 
Illustration. — De Candolle, I.e., pi. 6, B. Saunders' " Refug. Botan.," 
pi. 221. 
The most famihar member of the Sedastrum group, which Dr. 
Rose raises to the rank of a genus, and which is characterized by its 
basal dense leaf-rosettes, flowering-branches dying back to the base 
after flowering, and ovate carpels hollowed behind the scales. The 
present species is a lax, weak, tall, fleshy plant, with very pubescent 
stems and pubescent very broad leaves. It comes nearest 5. ruhri- 
caule Rose, which is stated to differ in its much less pubescent 
and purplish (not green or only slightly purphsh) stem, &c. (but plants 
