18 ERICACE^. 



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

 less converging. Stamens 10, often declined : filaments subulate, naked. iStyle 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. 



Suborder IV. MONOTROPP:.E. Calyx free from the ovary. Pollen- 

 o-rains simple. Capsule loculicidal. — Herbaceous root-parasites or saprophytes, 

 scaly, destitute of all greeu herbage, one closely related to Pyrolece, oue to 3ri- 

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



TuiBK I. EUiMONOTROPE.E. Ovary 5-celled, or sometimes 4-celled ; the pla- 

 centae projecting from the thick central columella. 



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



28. ALLOTROPA. Calyx of 5 roundisli sepals, marcesccnt 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, 



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



29. PTEROSPORA. Calyx deeply 5-parted. Corolla globular-urceolate ; 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 

 dorsall}' 2-awned ; the slender awns deflexed ; tlie cells opening lengthwise. Disk none. 

 Style short : stigma 5-lobed. ('ajisule depressed-globular, 5-lobed. Seeds broadly winged 

 from the apex. 



•t— -f— Corolla campanulate, with barely spreading lobes, rather fleshy : anthers muticous : 

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

 ling the corolla, persisteiU : filaments slender. 



30. SARCODES. Stamens 10, shorter than the cylindraceous-campanulate corolla : anthers 

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

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

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

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

 at the apex. 



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

 this 5-gibbous 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; 



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

 tardil}' deciduous. 



32. MONOTROPA. Sepals of 2 to 5 lanceolate bract-like scales. Corolla of 4 to 6 erect 

 and oblong or spatulate scale-like flesliy petals, wliicli are gibbous or saci'ate at base. 

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

 reniform ; the valves moderately or very dissimilar, l^isk 8-12-toothed ; tlie teeth deflexed. 

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

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

 nucleus minute in tlie loose-cellular elongated coat. 



Tribe II. PLEUPJCOSPORE.E. Ovary one-celled or spuriously 4-5-celled; the 

 4 or 5 placentae parietal and 2-lame.llate. Disk none or obscure: antheis 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. Condla of 4 or 5 obh)ng and fimbriate-lacerate i)lane 

 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 colunmar : stigma depressed- 

 capitate or somewhat funnelform. Capsule fleshy ? Seeds obovate, witli a smooth or 

 polished close coat. 



