18 ERICACEAE. 



27. PYROLA. Flowers in a raceme, 5-merous. Petals concave or incurved and more or 

 less converging. Stamens 10, often declined : filaments subulate, naked. Style often de- 

 clined or turned downward : stigma 5-lobed or toothed and annulate. Capsule depressed- 

 globose and 5-lobed, umbilicate at apex and base, dehiscent from the base upward ; the 

 edges of the valves cobwebby when opening. 



SUIIORDEU IV. MONOTROPE^E. Calyx free from the ovary. Pollen- 

 grains simple. Capsule loculicidal. Herbaceous root-parasites or saprophytes, 

 scaly, destitute of all green herbage, one closely related to Pyroleee, one to Eri- 

 cinecB, the others more peculiar. (Proc. Am. Acad. vii. 370.) 



TUIBK I. EUMOXOTROPPLE. Ovary 5-celled, or sometimes 4-celled ; the pla- 

 centae projecting from the thick central columella. 



* Anthers extrorsc, in flower becoming introrsely pendulous : corolla none. 



28. ALLOTROPA. Calyx of 5 roundish sepals, marcescent under the capsule. Stamens 

 10: anthers didymous, on long and slender filaments: cells opening by a chink from the 

 apparent apex to the middle. Disk none. Style short : stigma large, peltate-capitate. 

 Capsule globose. Seeds scobiform, linear. 



* * Anthers introrse or introrsely pendulous from the first : corolla gamopetalous, and 



with the calyx persistent or marcescent, 



-) Globular-ovate, with 5 short recurved lobes or teeth : anthers 2-awned. 



29. PTEROSPORA. Calyx deeply 5-parted. Corolla globular-urccolate ; the lobes con- 

 volute or mostly so in the bud. Stamens 10, included : filaments subulate-filiform : anthers 

 ovate-didymous, introrse, erect, or in bud horizontal-inflexed, fixed near the base, there 

 dorsally 2-awned : the slender awns deflexed ; the cells opening lengthwise. Disk none. 

 Style short : stigma 5-lobed. Capsule depressed-globular, 5-lobed. Seeds broadly winged 

 from the ape.\. 



-f 1 Corolla campanulate, with barely spreading lobes, rather fleshy : anthers muticous : 



seed-coat reticulated, but conformed to the nucleus : sepals 5, oblong, erect, nearly equal- 

 ling the corolla, persistent : filaments slender. 



30. BARCODES. Stamens 10, shorter than the cylindraccous-campanulate corolla : anthers 

 linear-oblong, erect, inserted above the base; the two eells strictly combined throughout, 

 the whole apex opening by a large introrsely oblique terminal pore. Disk none. Ovary 

 low-conical and 5-lobed: style columnar, rather long: stigma capitate and somewhat 

 5-lobed. Capsule dcpressed-5-lobed. Seeds oval and with a small conical protuberance 

 at the apex. 



31. SCHWEINITZIA. Stamens 10, hardly shorter than the oblong-eampanulate corolla, 

 this 5-gibbotis at base: anthers short, somewhat didymous, introrsely pendulous, being 

 attached dorsally near the apex ; the saccate cells opening by the whole apex as a large 

 pore. Disk 10-crenate. Ovary globose-ovate: style short and thick: stigma large, 

 5-sided, umbilicate. 



* * * Anthers innate or transverse on the apex of the filament, opening across the top ; 



the cells more or less confluent: corolla 4-5-petalous and with the sepals or bractlcts 

 tardily deciduous. 



32. MONOTROPA. Sepals of 2 to 5 lanceolate bract-like scales. Corolla of 4 to erect 

 and oblong or spatulate scale-like fleshy petals, which are gibbous or saccate at base. 

 Stamens twice the number of the petals : filaments filiform-subulate : anthers somewhat 

 reniform ; the valves moderately or very dissimilar. Disk 8-12-toothed ; the teeth deflexed. 

 Style columnar, tubular: stigma funnelform, with obscurely crenate margin. Capsule 

 ovoid ; the eolumella very thick and fleshy. Seeds innumerable, very small, scobiform ; 

 nucleus minute in the loose-cellular elongated coat. 



TRIBE If. PLEURICOSPOREJE. Ovary one-celled or spuriously 4-5-celled; the 

 4 or 5 placentae parietal and 2-lamellate. Disk none or obscure: anthers linear or 

 oblong, erect, introrse, fixed by the base to the long and slender filaments, opening 

 longitudinally. 



33. PLEURICOSPORA. Calyx complete, of 4 or 5 oblong-lanceolate scale-like sepals, 

 their margins fimbriate-laciniate. Corolla of 4 or 5 oblong and fimbriate-lacerate plane 

 petals, resembling but rather shorter than the sepals. Stamens 8 or 10, glabrous : fila- 

 ments ligulate-filiform : anthers linear, apiculate; the cells opening from base to apex 

 into two equal valves. Ovary ovate, strictly one-celled : style columnar: stigma depressed- 

 capitate or somewhat funnelform. Capsule fleshy ' Seeds obovate, with a smooth or 

 polished close coat. 



