226 ERICACEAE. (HEATH FAMILY.) 



which are from half to fully as long as the deeply campanulate bluish corolla : 

 capsule cylindraceous or clavate, \ inch long. On bare alpine slopes in the 

 Colorado Rocky Mountains, and extending into the arctic regions. 



2. C. planiflora, Engelm. Glabrous, from a few inches to a span high, 

 from a filiform rootstock bearing similar subterranean stolons : leaves 1 to 2 

 inches long, lanceolate to linear-lanceolate, the lowest ones sometimes broader, 

 all more or less dentate or denticulate : flowers larger, erect : calyx-lobes several 

 times longer than the tube and exceeding the tube of the shallow, wide open, 

 reddish-purple corolla : capsule ovate or turbinate, as long as the calyx-lobes 

 or shorter. Bot. Gaz, vii. 5. C. Langsdorffiana of the Rocky Mountain 

 Floras. C. Scheuchzeri, Gray, Fl. N. Am., as to Colorado forms. In subalpine 

 meadows, Colorado. The large shallow corolla is four times wider than deep. 

 # * Capsule opening near or at the base : taller, usually several to many-flowered, 



and in lower ground: rootstocks filiform. 



3. C. rotundifolia, L. Stems diffuse or erect, a foot or two long, 1 to 

 9-flowered, smooth : radical leaves slender-petioled, orbicular or cordate ; cauline 

 leaves linear : flower-buds erect : calyx-lobes setaceous-subulate : corolla bright 

 blue, campanulate, 4 to 1 inch long: capsule nodding. A subarctic species, 

 ranging southward in the mountains to Mexico. 



4. C. aparinoides, Pursh. Stem almost filiform, a foot or two high, 

 equally leafy to the top, its sharp angles rough with short retrorse bristles : so 

 also the midrib beneath and the margins of the lanceolate or linear sessile leaves: 

 flower-buds drooping : calyx-lobes triangular: corolla pale blue or whitish, deeply 

 cleft, the lobes 2 lines long or less: capsule erect. Wet grassy grounds from 

 Colorado to the Saskatchewan and eastward. 



ORDER 45. ERICACEAE. (HEATH FAMILY.) 



Shrubs, sometimes herbs, with the flowers regular or nearly so, the 

 stamens as many or twice as many as the 4 to 5 lobes or petals of the 

 corolla, free or nearly free from it, anthers 2-celled, commonly appen- 

 daged or opening by terminal chinks or pores, style one, ovary 3 to 

 10-celled. 



SUBORDER I. VACCIMIE^E. 



Calyx-tube adnate to the ovary, which forms a berry crowned 

 with the calyx-teeth. Corolla always gamopetalous and epigynous. 

 Shrubby or suffrutescent, with scaly buds and alternate leaves. 



1. Vaccinium. Ovary 4 to 5-oelled, or by false partitions from the back of these cells 8 to 



10-celled, wholly inferior : ovules numerous. Anther-cells tapering upward into a 

 tube. 



SUBORDER IT. ERICINE^E. 



Calyx free from the ovary. Corolla gamopetalous or rarely polypeta- 

 lous, hypogynous. Shrubs or small trees. 



* Fruit fleshy, either a berry or drupe. 



2. Arctost aphylog. Corolla urn-shaped. Stamens twice as many as the corolla lobes, 



included. Drupe berry*like, 5 to 10-seeded. 



