Monotropaceae with Reference to Ericaceae 



99 



expands slightly, forming a ring, below this is a circle of hairs. 

 The upper surface is hollowed out into a funnel-shaped 4-5- 

 sided stigma. 



In M. uniflora the ovary is ovoid, larger and more distinctly 

 ten-lobed than in M. hypopitys. At the base are developed the 

 ten nectaries similar to those of M. hypopitys, but larger. The 

 style is shorter, the stigma much less hollowed out than in 

 M . hypopitys, appearing more like a flat disc. 



In Sarcodes sanguinea the ovary is smooth, ten-lobed, each 

 lobe extending between two stamens and continued down into 

 a nectar-secreting portion. It is five-celled at the base, becom- 

 ing one-celled above as in Monotropa. The style is erect, bear- 

 ing a five-lobed stigma. 



In Pterospora the ovary is ten-lobed, depressed. It is five- 

 celled below and one-celled above as in all the preceding. No 

 nectaries are present. The style is short and broad, the stigma 

 peltate-capitate, slightly five-lobed. 



Fig. 9. Longitudinal section flower Newberrya spicata at base X 25. 

 F = filament, N = nectary, P = petal, S = sepal. 



In Pleuricospora the ovary is ovoid, not lobed, the epidermal 

 cells bearing distinct pointed papillae. It is four-celled at the 

 base (Fig. 8, 1) and for about one-sixth the length of the ovary, 

 but further up (Fig. 8, 2) the four placentae fail to meet and 

 do not extend far into the interior of the ovary, so that it appears 

 as a one-celled ovary with parietal placentae. There are no 

 nectaries present. The style is short and broad, the stigma 

 depressed capitate. 



In Schweinitzia the ovary is five-lobed with no downward 

 directed nectaries at the base ; it is five-lobed for about half the 

 distance; the placentae do not extend in quite as far as in Pyrola. 



