80 BOTANY. 



Vaccinium parvifolium, Smith; Hook. Bor.-Am. 2, p. 33, t. 128. Cascade mountains, 0. T. 



Vaccinium oxycoccus, Linn.; Hook. Flor. Bor.-Am. 2, p. 34. Sphagnous marshes, Cascade 

 mountains, 0. T. 



Vaccinium ovalifolium, Smith; Hook. Flor. Bor.-Am. 2, p. 32, t. 1 27. Cascade mountains, 0. T. 



Vaccinium myrtilloides, Michx.; Hook. Flor. Bor.-Am. 2, p. 32. Cascade mountains, 0. T. 



Vaccinium ovatum, Pursh; Hook. Flor. Bor.-Am. 2, p. 33. Cascade mountains, 0. T. 



Vaccinium c^spitosum? Michx.; Hook. Flor. Bor.-Am. 2, p. 33, £. 126. Cascade mountains. 



Chimaphilla umbellata, Pursh; Hook. Flor. Bor.-Am. 2, p. 49. N. California and Cascade 

 mountains, 0. T. 



Pyrola aphylla, Smith; Hook. Flor. Bor.-Am. 2, p. 48, t. 137. Pine forests, N. California, 

 and Cascade mountains, 0. T. 



Pyrola rotundifolia, Linn.; Hook. Flor. Bor.-Am. 2, p. 46. McCumber's, N. California. 



Pyrola dentata, Smith; Hook. Fl. Bor.-Am. 2, p. 46, t. 136. var. integrifolia, Cascade moun- 

 tains, 0. T. 



Pyrola minor, Linn.; Hook. Flor. Bor.-Am. 2. p. 45. Crater Pass, Cascade mountains ; 

 altitude 6,500 feet. 



Pterospora Andromedea, Nutt.; Hook. Flor. Bor.-Am. 2, p. 48. Pine woods throughout N. 

 California and Oregon. 



Cassiope tetragona, Don. in DC. Prod. 7, p. 611. Andromeda tetragona, Linn. Flor. Dan. 

 t. 1030 ; Pursh. Flor. p. 290 ; Hook. Bot. Mag. t. 3181 ; Flor. Bor.-Amer. 2, p. 58. Crater 

 pass, Cascade mountains. 



HEMITOMES, nov. gen. MONOTROPEAKUM. (By A. Gray.) 



Calyx disepalus, bracteoliformis. Corolla tuhuloso-urceolata, 4-5-loha, post anthesin mar- 

 cescens, lohis patentibus intus villosulis. Stamina hypogyna, 8 vel 10 : filaraenta filiformia, 

 superne harhata: anthera? basifixa3, glandula parva apiculata, dimidiatim uniloculars ; nempe, 

 loculo fertili ohlongo-lineari longitrorsum dehiscente, altero ad costam billamellatam reducto. 

 Discus nullus. Ovarium ovoideum, pseudo-quinqueloculare, nempe placenta3 4 bilamellataa 

 videntur, divaricatas, et inter se coalitas circum locellum centralem, extus intusque creberrime 

 ovulifera?. Stylus elongatus : stigma depressocapitatum, integerrimum, umbilicatum, per- 

 vium. Fructus ut videtur carnosus evalvis. — Rhizophytum brunneum, carnosum ; caule sim- 

 plici squamato'; floribus sessilibus in capitulum terminale congestis bracteatis. 



Hemitomes congestum. (Plate XIII.) Upper Des Chutes valley ; September. 



The addition of a new genus to the small order or sub-order 3Ionotropece, is a matter of no 

 small interest ; and this, founded on a fragmentary, but yet an adequate specimen, is the third 

 which has come to our knowledge from the Pacific border of the United States.* The plant 

 has much the aspect of a Monolropa of the section Hypopitys ; but is remarkable for bearing its 

 flowers in a dense, terminal, nearly hemispherical head. Each flower is subtended by a scaly 

 bract, nearly like the scales of the stem, and about as long as the corolla. The outer flowers 

 appear to be all tetramerous and octandrous, like the lower ones of Hypopitys, but some of the 

 inner ones have a 5-lobed corolla, and, I believe, 10 stamens. A pair of narrowly-linear 

 persistent lateral bractlets represent the calyx. The scarious-membranaceous corolla is urceolate- 



° Namely, Sarcodes of Torrey, (which is admirably illustrated in the Planta; Fre"montiari3e, p. 17, plate 10, and which was 

 near the same time published in California by Dr. Kellogg, under the name of Pterosporopsis,) and Allotropa, the single known 

 species of which Allotropa virgala, Torr. & Gray, ined. was gathered on the Cascade mountains of northern Oregon, by Dr. 



