PLANTS WRIGHTIAN^. 



29 



in that of M. Boissier). On the other hand, the ripe fruits of the specimens in the 

 Hookerian herbarium (viz. that of Cumings, No. 274, from the Andes of Chili, and 

 that of Bridges from Llayllay) show a nearly straight embryo, the radicle being 

 slightly bent, and with the edges of the broad and flat cotyledons directed to the axis 

 of the fruit. I therefore join our species to Porliera without hesitation. But the 

 Guaiacum arboreum, DC, judging from the detailed description of Kunth, cannot 

 belong to the same genus. G. parvifolium, Planchon in herb. Hook. {Andrieux PI. 

 Mexk. No. 475), has similar narrow leaflets, but has esquamulate filaments, and ap- 

 pears to be, like G. Guatemalense, Planchon in herb. Hook., a true Guaiacum. The 

 plant figured as G. sanctum in Gen. III. 2. t. 148 (G. Sloanei, Shuttleworth, PI. Ru- 

 gel, no. 68, 69) is no doubt G. verticale of Ortega ; but it has pubescent branch- 

 lets ; and I know not whether it is distinct from the Linnean G. sanctum. 



COCHLOSPERME^. 



79. Amoreuxia ScHEiDiANA, PlaucL in Hook. Land. Jour. Bot. &. p. 140. t. 1. 

 Euryanthe Scheideana, Cham. Sf Schlecht. in Linnaa, 5. p. 225. (Tab. III. B.) 

 Prairies near the San Pedro River, July ; mostly in fruit. " Flowers yellow." 

 Also near Monterey, Northern Mexico, Dr. Gregg, Dr. Edwards. — This beautiful 

 and highly remarkable plant has a known geographical range from the western 

 borders of Texas to New Granada. As the peduncles are often by abortion one- 

 flowered, I should without hesitation refer it to the original Amoreuxia palmatifida 

 of De Candolle, except that the flowers of the Mo9inian plant are said to be " ru- 

 belli." The fruit having now for the flrst time come to hand, I am able to give a 

 figure of it, and to complete Planchon's new character of the genus, which in all 

 other respects leaves nothing to be desired.* 



Capsula pendula, ovoidea (bipollicaria), trilocularis, 6-valvis ; valvis coriaceis ab 

 endocarpis et dissepimentis scariosis tenuissimis, axi centrali persistente adnatis, se- 

 cedentibus ; loculis polyspermis. Semina placentas centrali incrassata; affixa, obo- 

 voideo-rotundata, breviter anatropa : integumentum exterius tenue membranaceum, 

 laxum, fragile, arilliforme, facie ventrali raphi brevi prorainente peroursum, hilo par- 

 vo notatum, ab integumento interiori osseo nitido leviter reniformi omnino solutum. 

 Embryo in axi albuminis dense carnosi sigmoideo-biarcuatus, ejusdem fere longitu- 

 dine ; cotyledonibus foliaceis subflexuosis ; radicula crassissima brevi, hilo proxima, 



RUTACE^. 



80. RuTOSMA Texanum, Gray, Gen. Ill 2. p. 144, t. 155, ^ PI. Lindh. 2. p. 158. 



• Whether the A. Scheideana be different from A. palmatifida, BC, or not, there can be no doubt that 

 an incomplete specimen, characterized below, belongs to a species quite distinct from either. 



Amoreuxia malv^folia (sp. nov.) : foliis orbiculatis sublobatis, lobis (7) truncatls, costis subtus 

 cum pedunculis calycibusque tomentulosis ; staminibus vix inajquilongis. —Northern Mexico, near Chihua- 

 hua The imperfect specimen, in flower only, was gathered by an unknown, and apparently unscientific 

 collector, and sent, with other plants, to Mr. Scheer of Kew, and by him presented to Sir William Hook- 

 er, who has kindly permitted me to characterize the species. The flowers are about as large as those of 

 a' Scheideana, and accord with them in all essential particulars, except that the stamens are less unequal. 

 The leaves may be compared with those of Malva rotundifolia, and are scarcely more deeply lobed than they. 

 VOL. III. ART. 5. — 5. 



