384 MR. F. N. WILLIAMS: REVISION 
c. Sepala concava uninervia vel obsolete 3-nervia, 
glaberrima. 
75. A. nxcoPoDrorpEs, Willd. Herb. no. 8793, ex Schlecht. in 
Gesellsch. naturf. Fr. Berl. Mag. vii. p. 212 (1818); H. B. 4 K. 
Nov. Gen. et Spec. vi. p. 27. 
The specimens on the next sheet of Willdenow’s herbarium 
named A. decussata, Willd. herb. no. 8794, are more compact in 
habit, but are not otherwise sufficiently different to justify their 
separation as a distinct species. 
Hab. Mexico. 
SYN. A, decussata, Willd. Herb. ap. Schlecht. in Gesellsch. naturf. Fr. 
Berl. Mag. vii. p. 212 (1813). 
76. A. ROHRBACHIANA, Garcke, in Linnea, xxxvii p. 311 
(1871-72). 
Omnino glabra. Caules adscendenti-erecti crassi 4-angulares 
neque vero suleati, ramosi, ramis erectis. Folia anguste linearia, 
erecta vel patentia, demüm spe reflexa, plana, interdum basin 
versus ciliolata, acuminata neque raró mucronulata. Pedicelli 
longi, basi subcrassiores, primüm erecti, demüm patentes vel 
reflexi. Sepala ovato-oblonga late membranaceo-marginata, 
obsolete trinervia. Petala alba elongato-oblonga: obtusa, calyce 
sesquilongiora. Semina oblongo-lenticularia. 
Resembles a small-leaved form of Stellaria glauca, but petals 
not bifid. 
Hab. Mexico. 
Subsectio 3.—Flores solitarii, terminales. 
77. A. ORBIGNYANA, Wedd. in Ann. Sci. Nat. Sér. V. i. 1864, 
p. 293; Rohrb. in Linnea, xxxvii. p. 254. 
Pumila, glabra. Caules cespitem parvum formantes, 3-5 
centim., breviter ramosi. Folia subimbricata lineari- vel sub- 
spathulato-lanceolata acuta, margine presertim basin versus 
serrulato-ciliata. Pedicelli apicem versus puberuli. Sepala 
ovato-lanceolata vix obtusa. Petala alba obovato-lanceolata 
obtusa, calycem vix equantia. Stamina 5, calyce breviora. 
Hab. Republic of Bolivia: in the Andes, near Potosi. 
78. A. CATAMARCENSIS, Paz, in Engl. Bot. Jahrb. xviii. 1 
p. 29. . 
Humilis, pilis brevibus recurvis scabra, glaucescens. Caulis 
oq . inata 
ramosus. Folia linearia vel anguste lanceolata acum 
893, 
