44 PATAGONIAN EXPEDITIONS I BOTANY. 



1. LESQUERELLA MENDOCINA (Phil.) Small, (l^esicaria andicola Gill., 



nomen. ; K arctica Barneoud.) 



Tufted, erect, to 2-4 cm., from woody rhizome. Leaves spatulate or 

 oblanceolate, subentire, the upper sessile. Corymbs many-flowered. 

 Petals 4 mm. long. Silicle short-oval, few-seeded, the septum perfo- 

 rated. Style slender, 2 mm. Varying as to broadness and margin of the 

 leaves. 



(Arctic and N. Amer., Brazil) ; N. Patagon., along Rio Negro, near 

 Carmen de Patagones. 



2. L. MONTEVIDENSIS (Eichl.) Wats. (="L. mendocina Phil." in Index 



Kewensis, sub Vesicaria}. 



Compactly lepidote. Leaves narrow to linear-oblanceolate, entire or 

 repand-dentate. Flowers large. Style 2 mm. long. Silicle 6 mm. Cells 

 4-ovuled. 



(Brazil ; Chili) ; N. Patagon. 



15. HUTCHINSIA R. Br. 



Low herbs with forked pubescence, and racemes of small, white flowers, 

 the ped^lncle elongating in fruit. Style none or short. Silicle oval, com- 

 pressed, with narrow septum ; its valves with midrib. Seeds numerous. 



Species 8, N. Hemisph., i in Asia and Austral.; 2 in Bolivia, and i 

 in Patagon. 



H. RETICULATA Griseb. 



Dwarf, diffuse, glabrous annual. Lowest leaves pinnatisect, long- 

 stalked ; segments mostly only i pair, short, obtuse. Cauline leaves 

 oblong, auricled or entire. Flowers few. Silicles oblong, obtuse. 

 Valves reticulate. Cotyledons accumbent. 



Patagon., by Golfo de San Jorge, and Lago Argentine; Magellan, 

 Brunswick Penins. 



1 6. BURSA Weber. (Capsella DC.) Shepherd's-purse. 



Erect annuals, with forked hairs, and basal rosettes of pinnatifid leaves. 

 Silicles cuneate-obcordate, compressed, with narrow septum ; the valves 

 keeled. Style short. Seeds numerous. Cotyledons accumbent. 



Species 2, Eur., widely distributed as weeds and polymorphous. Some 

 Australian forms are also closely allied to this genus. 



