﻿l60 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 47 



Key to Species of Lenophyllum 

 Leaves obtuse or rounded at apex. 



Leaves broad at base. 1. /.. guttatum. 



Leaves narrow at base. 2. L. weinbergii. 



Leaves acute. 



Pairs of leaves distant; corolla greenish-yellow. 3. L. acutifolium. 



Pairs of leaves not distant; corolla "rosy yellow." 4. L. texanum. 



1. LENOPHYLLUM GUTTATUM Rose 



(Plate XX) 

 Scdum guttatum Rose, Bull. N. Y. Bot. Garden 3: 42. 1903. 



Much branched at base; shortly caulescent; leaves glabrous, oppo- 

 site, of 2 to 4 pairs, 2 to 3 cm. long, thickish, rounded on the back, 

 broadly channeled on the face, of a sage-gray color blotched with pur- 

 ple-black, obtuse ; inflorescence 3- or 4-branched ; pedicels very short 

 or wanting; sepals free nearly to the base, oblong, 3 to 4 mm. long, 

 equal, green, obtuse ; petals narrowly oblong, 5 mm. long, obtuse, 

 yellow but in old flowers drying reddish, free to the base; stamens 10, 

 shorter than the petals ; the 5 opposite the sepals free to the base, the 

 other 5 borne on the petals, attached about one-third the way up 

 from the base; scales small, obtuse; carpels 5, distinct to the base, 

 erect ; styles about as long as the carpels, slightly spreading in age. 



Common in the crevices of the most exposed rocks on summit of 

 hill at Saltillo, Mexico. 



Collected by Dr. E. Palmer, in 1902 (no. 309), and now in culti- 

 vation in Washington and at the New York Botanical Garden. It has 

 repeatedly flowered at both places. 



The original description of the species was drawn from vegetating 

 plants and poorly preserved flowering specimens, and this has necessi- 

 tated some slight changes in the description, especially with respect 

 to the inflorescence and color of the flowers. 



Explanation of Plate XX. — Fig. a, plant with well-developed inflorescence; 

 b, another plant with inflorescence not developed; c, flower; d, petals and 

 stamens; e, carpels; f, cross-section of leaf. Fig. a, b, f. natural size; c, 2 l / 2 

 times natural size; d, e, 3 times natural size. (All the illustrations in this 

 paper are from drawings by the late F. A. Walpole.) 



2. LENOPHYLLUM WEINBERGII Britton, sp. nov. 



(Figure 18) 



( rlabrous, pale green ; plants flowering from cuttings at the height 

 of 5 cm., and in that stage unbranched ; lower leaves rhombic-obovate, 

 very fleshy, trough-shaped, about 1.5 cm. long and 1 to 1.5 cm. wide. 

 narrowed but blunt at the apex, cuneate-narrowed at the base, oppo- 



