ERICACE^. 15 



epigynous. Anthers erect, introrse ; the cells partly separate or prolonged at 

 apex into a tip or a tubular appendage, where they open by a pore or chink. 

 Pollen-grains compound, of four united grains. Stigma not indusiate. Seeds 

 with a close and firm coat. — Shrubby or sutfrutescent, with scaly buds : leaves all 

 alternate. 



* Ovary wliolly inferior : herbage not aromatic. 



1. GAYLUSSACIA. Ovary 10-celled, 10-ovuled. Fruit baccate-drupaceous, with 10 

 seed-like nutlets. 



2. VACCINIUM. Ovary 4-5 celled, or by false-partitions from the back of these cells 

 8-10 celled : ovules numerous. Fruit a berry ; its cells several-many-seeded. 



* * Ovary at first one third to one half superior : herbage aromatic as in Gaultheria. 



3. CHIOGENES. Ovary and white berry 4-celled, many-seeded. Corolla short-campanu- 

 late, 4-clcft. Stamens 8 : anthers awnless, 4-cuspidate at apex. 



Suborder II. ERICINEJE. Calyx free from the ovary. Corolla gamo- 

 petalous, rarely polypetalous or nearly so, hypogynous. Disk generally annular 

 or 8-10-lobed. Anthers upright, introrse. Pollen-grains compound. Shrubs or 

 small trees. 



Tribe I. ARBUTEiE. Fruit fleshy, either baccate or drupaceous. Corolla urceo- 

 late or globular, 5-toothed or rarely -i-toothed, deciduous. Stamens twice as many 

 as the corolla lobes, included. Buds scaly. Leaves alternate. 



4. ARBUTUS. Anthers compressed, bearing a pair of reflexed awns on the back, each 

 cell opening at the apex anteriorly by a terminal pore. Ovary 5- (rarely 4-) celled, ripen- 

 ing into a granular-coated and many-seeded berry, with firm endocarp. 



5. ARCTOSTAPHYLOS. Ovary 4-10-celIed, with solitary ovules in the cells, in fruit 

 forming a drupe with as many seed-like nutlets or a solid stone. 



Tribe II. ANDROMEDE^E. Fruit a loculicidal chiefly .5-celled and many-seeded 

 capsule ; the valves usually bearing the partitions, which separate from the per- 

 sistent placentiferous axis or columella. Corolla gamopetalous, deciduous. Stamens 

 twice the number of the corolla- lobes (mostly 10), more or less included. Leaves 

 mainly alternate. 



* Anther-cells opening through their whole length, not appendaged : stigma 5-lobed ; the 

 lobes adnate to a surrounding ring or cup. 



6. EPIG^A. Calyx of 5 nearly distinct and strongly imbricated dry and scarious sepals. 

 Corolla salver-form, 5-lobed. Stamens 10, mostly equalling the tube of the corolla: fila- 

 ments filiform : anthers linear-oblong, blunt. 



* * Anthers opening only at the top : stigma usually entire. 



■i- Calyx becoming fleshy and baccate in fruit, enclosing the small capsule. 



7. GAULTHERIA. Calyx 5-cleft ; its lobes imbricated. Corolla ovate-urceolate to cam- 

 panulate. Stamens 10 : filaments dilated towards the base : capsule deeply umbilicate ; 

 placenta; ascending. 



H 1— Calyx unchanged and dry under the capsule. 



-H- The lobes or sepals valvate or open in the bud, never overlapping. 



8. ANDROMEDA. Corolla from globular-urceolate to cylindraceous, 5-toothcd or 5-lobcd. 

 Ovary and capsule 5-celled, umbilicate: placentae borne on the summit or middle of the 

 columella ; the seeds pendulous or spreading in all directions. 



-H- ++ Sepals or calyx-lobes more or less imbricated, at least in the early bud. 

 = Corolla cylindraceous or conical-urceolate, 5-tootlied : anthers fixed toward their base : 

 leaves plane, usually large and broad : capsule not thickened at the dorsal sutures. 



9. OXYDENDRUM. Calyx short, early open, naked at base. Corolla minutely canes- 

 cent. Antliers linear, unappendaged, narrower than the broadly subulate filaments ; the 

 cells opening by a long chink. Capsule ovoid-pyramidal : placentae on the short columella 

 at the base of the cells. Seeds all ascending or erect, scobiform, with loose reticulated 

 coat extended at each end much beyond the linear nucleus. Bracts and bractlets mmute 

 and deciduous. 



