548 Dowell : North American species of Calceolaria 



the West Indies ; a few occur in the Old World, and the rest are 

 South American. The North American species are found chiefly 



M 



West 



The 



species included in this paper are only such as are represented by 

 specimens in the Gray Herbarium of Harvard University, in the 

 herbaria of the United States National Museum, Columbia Univer- 

 sity and the New York Botanical Garden, and in the private her- 

 barium of Mr. T. S. Brandegee. 



CALCEOLARIA Lofl. (Iter Hisp. 183; hyponym. 1758) 



Reise 244. 1766. Type, Viola Calceolaria L. 



Solea Spreng. Jour. Bot. Schrad. 4: 192. 1800 



Ionidium Vent. Jard. Malm. pL 2J. 1804 



Herbs, or rarely small shrubs, with simple alternate or opposite 

 leaves and axillary or racemose flowers. Peduncles or pedicels 

 one-flowered, solitary in the axils of the leaves or bracts, mostly 

 bibracteate near the middle, articulate above the middle. Sepals 

 unequal, not appendaged at the base. Lower petal largest, saccate 

 or gibbous at the base ; the two lateral petals longer than the 

 upper pair. Stamens alternate with the petals, each of the lower 

 with a gland or spur at the base, membranaceous at the top by the 

 prolongation of the filament above the anther ; anthers connivent. 

 Capsule few-ovuled, otherwise similar to that of Viola. Seeds 

 ovoid-globose with hard seed-coats ; M embryo straight, central in 

 the fleshy perisperm ; cotyledons ovate." 



Analytical key 



Lower petal less than twice the length of the sepals. s 

 Flowers axillary. 



Leaves narrow, linear to oblong, usually entire. I. C. verticillata. 



Leaves wider, usually ovate. 



Petiole short or none. 2. C. glutinosa. 



Petiole 1 cm. long or longer. 3. C. tenuifolia. 



4. C. fruticulosa. 



Flowers racemose. 



Ix> 



Stipules minute, 5 mm. or shorter. 



Plant procumbent, small. 5. £ proctimbens, 



Plant erect or ascending. 



Leaves alternate or clustered. 



Flowers long-peduncled. 6. C. longipes. 



Flowers short-peduncled. 7. C. glabra. 



Lower. leaves usually opposite. 



Leaves about twice as long as broad or shorter. 



Leaves crenulate-serrate, glabrate. 8. C. brevis. 



