302 CONVOLVULACE^:. XXIX. EVOLVULUS. XXX. CLADOSTYLES. XXXI. WIISONIA. XXXII. DICHONDRA. 



Calyx hairy ; segments lanceolate, acuminated. Corolla pale 

 blue. Ev. virgatus, Willd. rel. is probably the same. 

 Very narrow-leaved Evolvulus. PI. procumbent. 



18 E. NUTTALLIA'NUS (Rcem. et Schultes, syst. 6. p. 198.) 

 erect ; leaves linear-oblong, clothed with silky tomentum or 

 hairs on both surfaces ; peduncles short, 1 -flowered. % . F. 

 Native on the banks of the Missouri, and the high hills of Red 

 River, near Kiamesha ; also in Florida, and about the banks of 

 the Platte ; and of Mexico. E. argenteus, Pursh, fl. 1. p. 

 187. Nutt. gen. amer. 1. p. 174. but not of R. Br. Flowers 

 purple, coming out about the middle of the stem. Sepals partly 

 linear, and acuminated. 



Nuttall's Evolvulus. Fl. May, June. Clt. 1821. PI. 

 erect. 



19 E. LATIFOLIUS (Ker. bot. reg. 401.) suffruticose, villous, 

 erect at bottom ; branches diffuse ; leaves nearly sessile, ob- 

 long-cordate, acuminated ; fascicles of flowers nearly sessile, 

 generally 3-flowered ; sepals linear-lanceolate, pilosely ciliated. 

 Tj. . S. Native of Brazil. Corollas white, rotate. Styles 2, 

 bipartite. 



Broad-leaved Evolvulus. Fl. June, July. Clt. 1819. PI. 

 diffuse. 



20 E. CAPITA'TDS (Nees et Mart, in act. bonn. 11. p. 80.) 

 erect, hairy ; leaves sessile, lanceolate ; flowers capitate, termi- 

 nal. O- S. Native of Brazil, about Barra da Varada, in fields. 

 Plant hoary. Leaves sessile, hoary beneath, \\ inch long. 

 Flowers in small villous heads, involucrated by 5-6 ovate-elliptic 

 bracteas. Calycine segments unequal, villous. Corolla red- 

 dish, somewhat funnel-shaped, twice longer than the calyx ; 

 limb large, 5-angled, plicate, villous outside. 



Capitate-flowered Evolvulus. PI. 1 foot. 



21 E. GLOMERA'TUS (Nees et Mart, in act. bonn. 11. p. 81.) 

 procumbent, villous ; leaves oblong, attenuated at the base ; 

 heads of flowers axillary and terminal, leafy. J? . S. Native 

 of Brazil, about Tamburil and Valos, among bushes. Leaves 

 6-9 lines long, on short petioles : lower ones obtuse : superior 

 ones acutish. Heads of flowers sessile, mixed with oblong-lan- 

 ceolate or lanceolate, villous bracteas. Calycine segments lanceo- 

 late, acuminated. Corolla somewhat funnel-shaped, blue ; limb 

 5-lobed, dilated. 



G/omerate-flowered Evolvulus. Shrub procumbent. 



} Doubtful species. 



22 E. ARBU'SCULUS (Poir. suppl. 3. p. 459.) plant hispid ; 

 leaves small, almost sessile, ovate-lanceolate ; flowers lateral and 

 terminal, on short peduncles ; stem much branched, filiform. 

 Tj. S. Native of St. Domingo. Leaves hairy. Calyx hardly 

 pilose ; segments acute. Corolla white, twice longer than the 

 calyx. 



Arbusculous Evolvulus. Shrub. 



23 E. ACAPULCE'NSIS (Willd. rel. ex Rcem. et Schultes, syst. 

 6. p. 199.) leaves lanceolate, villous, sessile ; stem branched at 

 the base ; peduncles usually 2-flowered, length of leaves. O. 

 S. Native of Mexico, about Acapulco. 



Acapulco Evolvulus. PI. procumbent. 



24 E. MACROPHY'LLUS (Willd. rel. 1. c.) stem erect, branched ; 

 leaves ovate-oblong, mucronate, tomentose ; corymbs axillary. 

 \l . S. Native of South America. Humb. et Bonpl. 



Long-leaved Evolvulus. Shrub erect. 



Cull. The species of Evolvulus are pretty little plants, of 

 easy culture. They all do well in a light sandy soil, or a mix- 

 ture of sand and peat. They are all readily increased by seed, 

 which ripen in abundance. 



XXX. CLADOSTYLES (from K\alo f , klados, a branch ; 

 and orvXoe, stylos, a column ; in reference to the branched 



style.) Humb. et Bonpl. pi. aequin. 1. p. 202. t. 57. H. B. 

 et Kunth, nov. gen. amer. 3. p. 118. 



LIN. SYST. Pentundria, Digynia. Calyx 5-parted. Corolla 

 rotately-campanulate ; limb 5-cleft. Styles 2, bipartite ; stig- 

 mas simple. Capsule 1 -celled, 1 -seeded, not dehiscent. An 

 erect herb ; with alternate, entire leaves, and terminal loose 

 panicles of small yellow flowers. 



1. C. PANICULA'TA (Humb. et Bonpl. 1. c.) 0. S. Native 

 of New Granada, near Turbaco. Stem branched, rather rough 

 from adpressed, scattered hairs. Leaves sessile, lanceolate, 

 acute, mucronate, narrowed at the base, beset with adpressed 

 hairs on both surfaces, 1 inch long, and 3-4 lines broad. 

 Flowers on long pedicels. 



Panic led- fiovtered Cladostyles. PI. 2 feet. 



Cult. For culture and propagation see Evolvulus, above. 



XXXI. WILSONIA (named in memory of John Wilson, 

 author of a synopsis of British plants in Ray's method.) 

 R. Br. prod. p. 490. Choisy, in mem. soc. phys. gen. 6. 

 p. 496. 



LIN. SYST. Penl6ndria, Monogynia. Calyx urceolate, penta- 

 gonal, 5-toothed. Corolla funnel-shaped, imbricate in aestiva- 

 tion. Style bifid ; stigmas capitate. Ovarium small, 2-seeded. 

 An humble, prostrate, much branched, downy shrub. Leaves 

 imbricated in 2 rows, small, thickish, sessile. Flowers axillary, 

 sessile, solitary, bractless. 



1 W. HU'MILIS (R. Br, 1. c.) (7 . G. Native of New Hol- 

 land, on the south coast. 



Dwarf Wilsonia. Shrub prostrate. 



Cult. This is a singular and beautiful prostrate shrub, worth 

 cultivating in every collection. A mixture of sand, loam, and 

 peat, is the best soil for it ; and it will be easily propagated by 

 cuttings or by seeds. 



TRIBE III. DICHO'NDRE-E (this tribe contains plants 

 agreeing with Dichondra in having distinct carpella.) Choisy, 

 in mem. soc. phys. gen. 6. p. 497. Embryo cotyledonous. 

 Carpella distinct. 



XXXII. DICHO'NDRA (from St , dis, double ; and x^pe, 

 chondros, a grain ; in reference to the double capsule.) Forst. 

 gen. p. 39. t. 20. Lam. ill. t. 183. R. Br. prod. 491. Juss. gen. 

 129. ed. Usteri, p. 144. H. B. et Kunth, nov. gen. 3. p. 119. 

 Sibthorpia spec. Lin. Steripha, Gaert. fruct. 2. p. 81. t. 94. 

 Demidofia, Gmel. veg. 458. Anonymos, Walt. fl. car. 1. 

 p. 110. 



LIN. SYST. Pentdndria, Digynia. Calyx 5-parted. Corolla 

 subrotate or campanulate ; limb flat, 5-parted. Ovaria 2, 

 2-seeded. Styles 2, basilar ; stigmas capitate or thick. Cap- 

 sules 2, utricular, 1 -seeded. Humble, creeping, downy, non- 

 lactescent herbs. Leaves cordate or reniform, entire, petiolate. 

 Peduncles axillary, 1 -flowered, without bracteas. 



1 D. RE'PENS (Forst. gen. p. 39. t. 20.) leaves reniform or 

 roundish-cordate, glabrous above and downy beneath ; calyx 

 exceeding the corolla a little. ? Tf. , F. Native of America, New 

 Holland, Van Diemen's Land ; and of the East Indies, on 

 Mount Taong-Dong, Ava, &c. Lam. ill. t. 183. Ruiz, et 

 Pav. fl. per. 3. p. 22. Sibthorpia evolvulacea, Lin. suppl. p. 

 288. Steripha reniformis, Gaertn. fruct. 2. p. 81. t. 94. Leaves 

 sometimes retuse or emarginate, ex R. Br. 



Creeping Dichondra. Fl. July, Aug. Clt. 1803. PI. cr. 



2 D. ROTUNDiFoLiA(Link. enum. 1. p. 249.) stems procumbent, 

 hairy ; leaves on long petioles, reniform, emarginate, repandly 

 crenated, of the same colour on both surfaces, hairy ; calyxes 

 ciliated, hairy. 7/ . F. Native of Persia. 



Round-leaved Dichondra. Fl. June, Aug. Clt. 1816. PI. 

 trailing. 



3 D. CAROLINIA'NA (Michx. fl. bor. amer. 1. p. 136.) leaves 



