as distinguished from the Syuiplocaccx. 277 



nitida, dura, ovulis abortivis circa hilum magnum basalem 



notata ; raphe primo tubularis, conipressa, ossea, hili basin 



])erforans et mox in faciem internaui tcst?e patescens, hinc 



breviter ramosa, et cito in filamentis innumerabilibus delica- 



tissimis spiralibus cottoneo-implexis in telam araueiformem 



ubique producta; integumentum intermedium opacum, mem- 



brauaceum ; integumentum internum tenuiter membranaceura, 



ad priorem subadhsesum ; albumen carnosum ; embryo axilis, 



longitudiue fere albumiuis, cotyledonibus foliaceis, rotundato- 



ovatis, imo subcordatis, nervosis, radicula tereti infera duplo 



longioribus, et 6-plo latioribus. 



Arbores vel frutices in Europa, America boreali, Asia et Japonia 



crescentes, scepe pilis stellulosis tomentosee ; folia alterna, in- 



tegra, vel dentata,petiolata ; racemi terminales,plurijiori,foliosi, 



vel bracteati aut axillares et paucijiori ; Hores ulbidi. 



Of the forty-five species of Stijrax enumerated by DeCandolle, 



I have removed thirty-one into Strigilia, and five into Cyrta : to 



the remaining nine (some of which yet remain to be verified) 



must be added S. odoratissimum, Champ. (Hook. Kew Jo. Bot. 



iv. 304), S. ellipticum and S. subpaniculatum, Jungh. et Vriese 



(Walp. Rep. vi. 459). S. Obassia, from Japan, bears greatly the 



habit and inflorescence of Pterostyrax ; but, as its fruit is said to 



be drupaceous, it must be referred to the tribe Styraciiieie : its 



broadish rounded petals are much imbricated in sestivation. 



S. odoratissimum, from China, is a very distinct species; its 



corolla is also imbricated in testivation, and its drupe is acutely 



mucronated, with a tendency to split at the base into three 



regular valves. S. Benzoin appears to diff'er from both in having 



very entire leaves and a compound raceme. I have not seen its 



flowers ; but its fruit corresponds with that of S. officinalis. 



2. Cyrta. 

 I have already alluded to the principal features that distin- 

 guish this genus from Styrax : its thicker and more ligneous 

 pericarp opens at the apex and splits down to the base in three 

 equal valves ; the form of its much thicker petals and the manner 

 of their sestivation are different from those in Styrax, Halesia, 

 and Pterostyrax, being valvate or slightly introflexed, as in 

 Strigilia, Pamphilia, and Foveolaria. I have drawn up its ge- 

 neric character from observation upon most of the under- 

 mentioned species. 



Cyrta, Loureiro. — Flores hermaphroditi. Calyx urceolato-cya- 

 thiformis, margine 5-deutatus, dentibus nervis prominulis 

 decurrcntibus hinc o-carinatus, persistens. Petala 5, lineari- 

 oblonga, acuta, crassiuscula, extus tomentella, intus glabra,imo 



