MACLOSKIE I POLYGALACE^E. 547 



KEY TO THE SPECIES. 

 A. Leaves very narrow. 



b. Leaves and branches, filiform, rush-like. Floral wings white ; petals blue. Seeds 

 villous. stenophylla. 



t>2. Leaves linear-filiform, remote, erect. Racemes spiciform. patagonica. 



b$. Leaves narrow-linear, remote dotted. Seeds retro rsely pilose. -uariabilis, 



A2. Leaves linear. Racemes terminal, many-flowered. 



b. Leaves acute, margin revolute. Outer sepals whitish. Capsule broad-elliptical. 



desiderata, 

 b2. Leaves subobtuse, crispy. Wings obovate, /-nerved. Capsule attenuate upwards. 



gnidioides. 

 A$. Leaves oblanceolate or obovate, epiphyll hoary. Heads terminal, few-flowered. External 



sepals whitish. cedipus. 



A^. Leaves elliptical-obovate. Racemes terminal, few-flowered. 



b. Flowers only 5 mm. long. Leaves rather broad. darwiniana. 



b2. Flowers larger and leaves narrower. tehuelchum. 



A$. Leaves elliptical, obtuse, thickish, small. Flowers few, subspicate, terminal on the branchlets. 



moyanoi. 



A6. Leaves oblong-linear, crowded. Capsule slightly 2-horned. thesioides. 



Aj. Leaves small and acutish on lax branches, or larger and spatulate on spiny branches. 

 Villous plants. spinescens. 



A8. Leaves cuneate-attenuate, fleshy. Plants prostrate, glabrous. salasiana. 



Ag. Leaves broadly obovate or obtriangular. Racemes few-flowered. Capsule narrowly winged. 



oreophila. 



I. POLYGALA DARWINIANA Benn. 



Stem woody below, much branching, 5-15 cm. high. Leaves narrow- 

 elliptical-obovate, margin slightly glandular. Racemes terminal, few- 

 flowered. Pedicels glabrous, bracts ovate, i mm. long. Flowers as large 

 as the leaves. Outer sepals small, upper one larger. Wings obovate- 

 cuneate, large. 



Near to P. tekuelchum (Speg.), but with broader leaves, and much 

 smaller flowers, which are scarcely 5 mm. long. Keel with a beautiful 

 fimbriate crest. Style short, stigma crested like a duck's bill. 



S. Patagon., Puerto Deseado. (C. Darwin.) 



2. P. DESIDERATA Speg. 



(Orthopolygala, pterocarpa, a spa la to idea.} Perennial, crisp-pubescent; 

 root vertical, stout, cespitose-branching at top. Branchlets fastigiate, 

 crowded, hoary upwards. Leaves thickish, crowded, spreading, broad- 

 linear, doubly attenuate, acute, marginally revolute, tomentose in youth. 

 Racemes acrogenous, sessile, ovate, many-flowered, with small, white, cadu- 



