370 PROCEEDINGS OF THE AMERICAN ACADEMY 



Dr. Torrey, in making the rectification, proposes to call Newberrya, 

 in honor of the distinguished vegetable palaeontologist and geologist 

 who discovered it. The principal differences between these two genera 

 appear in the subjoined synopsis. That of the seven genera of the 

 group, all but the Linnasan one should rest upon single species, is not 

 altogether satisfactory to contemplate ; but their characters are so 

 marked that it does not seem possible to combine any two of them.* 



* Conspectus Generum Monotropearum. 



Tribus I. EUMONOTROPEtE. Ovarium 4 - 5-loculare, placentis axilibus in 

 columnam crassam concretis. Testa seininum laxa reticulata. 



§ 1. Corolla nulla. Calyx 4 - 5-sepalus. Antherae in alabnstro extrorsae basim 

 versus rimis brevibus dehiscences, sub anthesi inversae introrsum pendulae. Semina 

 scobiformia. Nexus cum Pyroleis mediante Pyrola aphylla. 



1. Allotropa, Torr. & Gray, supra. 



§ 2. Corolla gamopetala. Calyx 4 - 5-sepalus. Antherae introrsae, 

 * Muticae, apice foraminibus hiantes. Corolla? campanulata, 5-loba. Testa 

 seminum nucleo subconformis. 



2. Schweinitzia, Ell. Antherae breves, didymae, in alabastro transversa, sub 

 antbesi introrsum pendulae. Discus 10-crenatus. Stylus brevis crassus. 



3. Sarcodes, Torr. Antherae lineari-oblongae, erectae, supra basim affixae. 

 Discus nullus. Stylus elongatus. 



** Antherae introrsum pendulae, dorso biaristatae, longitrorsum dehiscentes. 

 Corolla ovata, 5-dentata. Semina scobiformia apice insigniter alata. 



4. Pterospora, Nutt. 



§ 3. Corolla 4 - 5-petala, petalis basi gibbosis vel saccatis. Calyx imperfectus, 

 e bracteolis sepalisve 2-5. Antherae innatae, didymae vel reniformes, confluentim 

 uniloculares, ab apice transversim bivalves. Discus e dentibus 8 vel 10 deflexis. 

 Semina scobiformia. 



5. Monotropa, Linn. [Hypopitys, Dill.) 



Tribus II. PLEURICOSPORE^E. Ovarium uniloculare : placentae. 4-5 

 parietales, bicrures vel bipartitae. Testa seminum tenuis nucleo arete conformis. 

 Discus nullus. Antherae innatae, oblongo-lineares, biloculares, loculis parallelis 

 longitudinaliter bivalves. Stylus elongatus. 



6. Pleuricospora. Calyx completus, e sepalis 4-5 petalis discretis subcon- 

 formibus, utrigqueiimbriolatis. Genitalia glabra. Antherae lateraliter dehiscentes 

 in valvibus fere aequalibus. Flores spicati. 



7. Newberrya, Torr. in Ann. Lye. N. Y. 8, p. 7, 1864. (Hemitomes, Gray, 

 nomen falsum.) Calyx incompletus, disepalus, braeteoliformis. Corolla gamo- 

 petala, urceolato-tubulosa, 4 -5-loba, lobis intus villosulis. Filamenta filiformia 

 stylusque superne villoso-crinita. Antherae introrsum dehiscentes, loculis inae- 

 qualiter bivalvibus. Flores capitati. — Newberrya coxgesta, Torr. = Hemito- 

 mes congestum, Gray. 



