. Contributions from the Botanical Laboratory, vol. 5. Botany; Botany. 100 Henderson—Comparative Sttidy of Pyrolaceae and The epidermal cells of the ovarian wall are slightly papillate. The style is short and thick, the stigma disc-like pentagonal. In Allotropa the ovary is five-lobed. It too is five-celled at the base, one-celled above. There are ten small slightly down-directed nectaries at the base of the ovary. In Newberry a the ovary is five-lobed, five-celled at the base, one-celled above. There are ten downward directed spur-like nectaries at the base of the ovary (Fig. 9). The ovary an
. Contributions from the Botanical Laboratory, vol. 5. Botany; Botany. 100 Henderson—Comparative Sttidy of Pyrolaceae and The epidermal cells of the ovarian wall are slightly papillate. The style is short and thick, the stigma disc-like pentagonal. In Allotropa the ovary is five-lobed. It too is five-celled at the base, one-celled above. There are ten small slightly down-directed nectaries at the base of the ovary. In Newberry a the ovary is five-lobed, five-celled at the base, one-celled above. There are ten downward directed spur-like nectaries at the base of the ovary (Fig. 9). The ovary and style are pubescent with simple unicellular hairs. The stigma is depressed capitate. In Cheilotheca the ovary is "fusiform, one-celled, narrowed into the short cylindric style; stigma globose conical; placentae six, parietal, bifid, the long branches on all sides covered by numerous ovules" (31). In the Ericaceae a five-lobed, completely five-celled ovary is characteristic. In the Pyrolaceae and Monotropaceae there is every transition from a five-celled ovary with central placenta, as in the Ericaceae, to an incompletely five-celled ovary with the placentae deep parietal and almost meeting, as in all the Pyrolaceae, also Sarcodes and Monotropa; to an incompletely five-celled ovary with the placentae not so deep parietal, so that there is a good space between them, as in Schweinitzia; to Pleuricospora where the ovary is four-celled for only a short distance, then one-celled above with parietal placentae that are close to the ovary wall. Drude (12) states that all the Pleuricosporeae are one-celled. The writer finds the condition in Newherrya as in the Pyrolaceae; in Pleuricospora 4-1-celled as above; no material of Cheilotheca could be obtained for exam- ination. Hooker (31) describes it as being one-celled with six parietal bifid placentae. In Ericaceae the ovary is often covered with hairs, peltate glandular in Rhododendron lapponicum; glandular and setaceous in
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