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, j 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 S. pachucense ; at that time the two species 

 had not been separated. 



45. Sedum Hemsleanum Rose. 

 S. 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. Set. 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. cit. 



Flowers winter. Not hardy. 

 Habitat. — Mexico. 



46. Sedum ebracteatum M09. and Sesse (fig. 68). 



S. 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 familiar 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 S. rubri- 

 caule Rose, which is stated to differ in its much less pubescent 

 and purplish (not green or only sUghtly purplish) stem, &c. (but plants 



