RHAMNEJE. XI. COLLETIA. XII. TREVOA. XIII. DISCARIA. XIV. HOVENIA. 



35 



6 C. CHACA'YE ; leaves somewhat obovate, serrated ; flowers 

 tern ; branches very leafy. Jj . G. Native of Peru. Rham- 

 nus Chacsye, Dotnb. herb. Flowers yellowish. 



Chacaye Colletia. Shrub 2 feet. 



7 C. TETRAGONA (Brogt). mem. rhamn. p. 59.) branches 

 almost naked, leafless, smooth ; branchlets distant, simple, spiny, 

 stiff", spreading ; racemes axillary, rising beneath the spines, usu- 

 ally 6-flowered ; fruit opposite on the branchlets, sessile on the 

 branches, racemose. Jj . G. Native of Peru. Domb. Flowers 

 yellowish. 



Tetragonal-branched Colletia. Shrub 3 feet. 



f Allied species. 



8 C. INFE'STA (Brogn. mem. rhamn. p. 59.) shrub much 

 branched ; branches almost opposite, cylindrical, ultimate ones 

 spiny ; spines simple, spreading, stiff, axillary ; leaves opposite, 

 oblong-linear, quite entire, smooth ; almost nerveless ; flowers 

 axillary, solitary ; peduncles slender, shorter than the leaves. 

 Jj . S. Native of Mexico, in the plains near Gazave. Ceano- 

 thus infestus, H. B. et Kunth, nov. gen. amer. 7. p. 61. t. 614. 

 D. C. prod.^2. p. 31. Rhamnus line&ris, Moc. et Sesse, in herb. 

 Lamb. Calyx hemispherical, with a spreading limb. Petals cu- 

 cullate. Anthers cordate ; cells confluent at top. Disk thin 

 at the limit of the throat, incrusting the tube. Ovary semi- 

 adnate to the bottom of the tube of the calyx, 3-celled. Style 

 simple, filiform, longer than the tube of the calyx. Stigma 

 simple. Flowers white. 



Troublesome Colletia. Cult. 1824. Shrub 3 feet. 



9 C. MULTIFLORA (Moc. et Sesse, fl. mex. icon. ined. D. C. 

 prod. 2. p. 29.) leaves entire, oblong; pedicels 1-flowered, 5-6, 

 crowded together, length of flower ; petals 5, cucullate. fj . G. 

 Native of Mexico. Disk extended even to the throat, and half 

 adnate to the ovary. Branches spiny, bearing the flowers be- 

 neath the spines. 



Many-flowered Colletia. Shrub 4 feet. 



10 C.? DISPE'RMA (D. C. prod. 2. p. 29.) leaves entire, oblong ; 

 pedicels 1-flowered, 2 or 3 in a fascicle, length of flowers; 

 flowers 5-petalled ; berries oblong, 2-celled. Tj . G. Native of 

 Mexico. Branches unarmed. Calyx very short in this and 

 preceding species. 



Two-seeded Colletia. Shrub 3 feet. 



11 C.? VELUTINA (Spreng. syst. 1. p. 771.) leaves alternate, 

 oblong, serrated, villous beneath ; peduncles axillary, cymose, 

 and downy, as well as the flowers. Jj . S. Native of Brazil. 



Velvety Colletia. Shrub 2 feet. 



Cult. See Retanilla for culture and propagation. 



XII. TREVO'A (Trevo, the name of some Spanish botanist). 

 Meyers, mss. Hook, bot. misc. 1. p. 158. 



LIN. SYST. Pentdndria, Monogynia. Calyx turbinate, 5- 

 cleft, permanent, with reflexed segments. Petals cucullate, erect, 

 inclosing the stamens. Anthers 1 -celled, bursting by a kidney- 

 shaped chink. Disk almost wanting. Ovary superior, large, 

 hairy, 3-celled; cells 1 -seeded. Style awl-shaped, much ex- 

 serted, and very hairy, crowned by an acute simple stigma. 

 Capsule membranous, 2-valved, 1 -seeded, (2 of the cells being 

 abortive) crowned by the permanent style. Seed erect, elliptical, 

 compressed, marked by a conspicuous longitudinal furrow. Al- 

 bumen sparing, fleshy. Embryo erect, cylindrical, with an 

 inferior radicle. Spiny shrubs with awl-shaped short spines, 

 cruciately disposed. Leaves in fours, marked with longitudinal 

 nerves. Fascicles of flowers rising from tubercles in the axils 

 of the leaves and at the base of the spines. 



1 T. QUINQUENE'RVIS (Gill, et Hook, bot. misc. 1. p. 158. t. 



45. B. ) hairy-pubescent ; leaves oblong-elliptic, entire, 5-nerved, 

 hoary beneath. Pj . G. Native of Chili on the Andes. 



Five-nerved-\ea.ted Trevoa. Shrub 4 to 5 feet. 



2 T. TRINE'RVIS (Gill. etHook, bot. misc. 1. p. 159.) smooth ; 

 leaves elliptic, crenately-serrated, 3-nerved, green beneath. 

 Tj.G. Native of Chili. 



T/iree-nened-]eaved Trevoa. Clt. 1828. Shrub 4 to 6 feet. 



Cult. For culture and propagation see Retanilla, p. 34. 



XIII. DISCARIA(fromm>c,<fo/tos, a disk ; disk broad). 

 Hook, bot. misc. 1. p. 156. 



LIN. SYST. Tetra-Pentandria, Monogynia. Calyx short, 

 campanulate, 4-5-cleft, coloured. Petals 4-5, smaller than the 

 stamens. Anthers 2-celled, bursting lengthwise. Disk girding 

 the base of the germ, bowl-shaped, fleshy, with a narrow, ele- 

 vated, nearly entire, free margin. Ovary half superior. Style 

 short, crowned by a 3-lobed stigma. Spiny shrubs. 



1 D. AMERICA'NA (Hook, bot. misc. 1. p. 156. t. 44. D.) 

 calyx for the mfl%t part j-cleft, with reflexed segments. fj . G. 

 Native of Buenos Ayres. 



American Discari* Shrub. 



2 D. AUSTRA'LIS (Hook, 1. c. p. 157. t, 45. A.) calyx 4-cleft, 

 with erect segments. Tj . G. Native of New Holland at Cox's 

 River to the south of Bathurst. Colletia pubescens, Brogn. mem. 

 rhamn. p. 59. Branches almost leafless, pubescent; branchlets 

 simple, spiny. Leaves few, opposite, obovate, minute, quite 

 entire, pubescent. Racemes short, many-flowered, rising from 

 beneath the spines. Petals small, linear, convolute. 



Southern Discaria. Shrub. 



Citl!. For culture and propagation see Retanilla, p. 34. 



FIG. 6. 



XIV. HOVE'NIA (in honour of David Hoven, a senator of 

 Amsterdam, who contributed to the success of the travels of 

 Thunberg by his good offices). Thunb. jap. 101. D. C. prod. 

 2. p. 40. Brogn. mem. rhamn. p. 60. 



LIN. SYST. Pentdndria, Monogynia. Calyx somewhat spread- 

 ing, 5-cleft (f. 6. B. a.}. Petals 5, obovate, unguiculate (f. 6. 

 B. e.*), convolute. Stamens inclosed in the petals ; anthers 

 ovate, 2-celled. Disk fleshy, flat (f. 6. B./.). Ovary 3-celled. 

 Style trifid. Stigmas 3, round. Fruit free, tricoccous (f. 6. B. 

 1.), seated on a thick fleshy peduncle (f. 6. B. A.). Trees, with 

 alternate, broad, cordate, serrated, 3-nerved leaves. 



1 H. DU'LCIS (Thunb. jap. 101.) leaves cordate, ovate, acu- 

 minated, equal at the base, 3-nerved, smooth. Jj . G. Native 

 of Japan, near Nagasaki, where it is called Ken and KenpoJtonas. 

 Kcempf. amcen. ex. 2. p. 809. with a figure. Flowers small, 

 white, in axillary and terminal dichotomous panicles. Peduncles 

 F 2 



