714 PATAGONIAN EXPEDITIONS : BOTANY. 



4. As the preceding, but calyx prismatic, 5 -angled. 8. Mimulus, p. 721. 



c$. Corolla not spurred nor saccate. Anther-cells usually fused. Stigma capitate. 



Minute herbs. 

 d. Leaves opposite ; internodes distinct. Corolla 2-lipped, 4~5-lobed. Calyx 5- 



parted. Stamens 2, anther-cells divaricating. 6. Bryodes, p 720. 



dz. Leaves basal, or apparently so, the internodes being short. Calyx 5-toothed. 



Stamens 4, the pollen-sacs fusing. 7. Limosella, p. 720. 



A2. The 2 dorsal corolla-lobes (or the upper lip) covered in the bud by one or both the lateral 



lobes. (RHINANTHOIDE^:.) 

 b. Corolla-lobes all flat and spreading, or the dorsal pair erect. 



c. Pollen-sacs finally united apically. Dorsal corolla-lobes often upright. Autophytes. 

 d. Corolla-tube short or none. Stamens 2 or 4, subequal, rarely 6-8. 



e. Stamens 4-5, rarely more, pollen-sacs fused. Corolla 4-merous, rotate ; with 

 no tube. Erect herbs or shrubs, with opposite leaves. 



9. Scoparia, p. 721. 

 2. Stamens only 2. Leaves, at least the lower, opposite. 



10. Veronica, p. 722. . 

 d2. Corolla with long tube, or campanulate. Stamens 4, didynamous. Calyx 5- 



parted. 



e. Leaves opposite ; flowers almost regular. Low herbs. II. Ourisia, p. 723. 

 e2. Leaves alternate. Corolla-tube ventricose, gradually widening. Stigma 



2-lobed. Coarse erect herbs and undershrubs. 12. Digitalis, p. 725. 



c2. Pollen-sacs distinct. Corolla-lobes spreading flat. Calyx 5-toothed, the teeth not 

 exceeding the tube. Stamens not protruding, their filaments hairy. Erect herbs 

 or half-shrubs, often more or less parasitical. 13. Gerardia, p. 726. 



b2. Corolla lobes forming a helmet-like upper-lip, with reflexed border ; corolla-tube nearly 

 straight. . Stamens 4 ; pollen-sacs equal. Stigma capitate. Usually small, erect 

 herbs, often more or less parasitical ; with simple or palmatifid leaves and flowers in 

 terminal spikes. 14. Euphrasia, p. 727. 



i. CALCEOLARIA Linn. 



Herbs or shrubs, with generally opposite or whorled leaves, and cymose 

 or rarely I -flowered peduncles, with yellow, white or purplish flowers. 



Calyx slightly adhering to the ovary, 4-partite, its parts valvate. Co- 

 rolla-tube nearly obsolete ; its limb concave, 2-lipped, the lips entire, con- 

 cave or shoe-like ; the anterior lip being usually large and inflated. 

 Stamens 2. Stigma small. Capsule ovate-conical, septicidal, with 2-cleft 

 valves. Seeds numerous, striate, marginless. 



Species 140, chiefly American, from Mexico by the Andes to Magellan ; 

 2 in New Zealand. 



KEY TO THE SPECIES. 

 A. Lower corolla-lip contracted at the base. 



b. The contracted part long. Leaves long-attenuate, subentire. Stem very short. Pedun- 

 cle scape-like, i -flowered. 



