POLEMONIACE^E. XIII. CANTUA. HYDROLEACE^. I. HYDEOLEA. 



249 



clothed with clammy, glandular hairs. Leaves truncate at the 

 base, hairy and clammy beneath. Calyx 5-cleft. Corollas 

 white. 



Oak-leaved Cantua. Shrub 10 to 12 feet. 



4 C. BUXIFOLIA (Juss. ann. mus. 3. p. 118. t. 8.) tomentose; 

 leaves cuneate-oblong, mucronulate, quite entire ; corymbs few- 

 flowered ; peduncles tomentose ; stamens longer than the co- 

 rolla, which is straight. Tj . S. Native of Peru, where it is 

 called Cocantu by the natives. Lam. diet. 1. p. 603. ill. 1. t. 

 106. f. 2. Cantua dependens, Pers. ench. 1. p. 187. Peri- 

 phragmos dependens, Ruiz, et Pav. fl. per. 2. p. 18. t. 133. 

 Cantua tomentosa, Cav. icon. 4 p. 43. t. 364. Tops of branches, 

 calyxes, and young leaves, downy. Corollas pale red. The 

 showy fl Avers of this beautiful shrub are used in adorning tem- 

 ples. Leaves and wood of this, as well as of other species, when 

 bruised or chewed, affords an elegant yellow colour, and might 

 therefore be useful in dyeing cloth. 



Box-leaved Cantua. Shrub 5 to 6 feet. 



5 C. OVA'TA (Cav. icon. 4. p. 43. t. 363. Juss. ann. mus. 3. 

 p. 118.) glabrous ; leaves obovate, rnucronate, entire, rarely cut 

 or toothed; peduncles solitary, 1 -flowered, glabrous; stamens 

 longer than the corolla, which is straight. ^ . S. Native of 

 Peru, where it is called Cantuttica, i. e. Canlu Jlos, by the na- 

 tives. Corolla bluish red, or white. 



Oca<e-leaved Cantua. Shrub 6 to 8 feet. 



C. ? CORDA'TA (Juss. ann. mus. 3. p. 119.) branches oppo- 

 site, sarmentose, downy ; leaves nearly opposite, cordate, downy ; 

 flowers axillary, solitary, pedicellate ; corolla tubular, much 

 exceeding the calyx, which is short, 5-cleft, and downy ; an- 

 thers exserted ; fruit unknown. J? . S. Native of Peru. 



Cort/nte-leaved Cantua. Shrub 4 to 6 feet. 



7 C. CUNEIFOLIA (Juss. 1. c.) this is a very doubtful species of 

 the genus, fj . S. Native of Peru. 



Wedge-leaied Cantua. Shrub 4 to 6 feet. 



8 C. ? MEG.APOTA'MICA (Spreng. syst. add. p. 64.) leaves 

 oblong-lanceolate, attenuated at both ends, quite glabrous, en- 

 tire, shining above ; panicles axillary. I; . S. Native of Brazil, 

 at Rio Grande, Sello. 



Rio Grande Cantua. Shrub. 



Cult. All the species are showy, and worth cultivating. 

 See Lceseha, p. 248, for culture and propagation. 



ORDER CLXIII. HYDROLEA'CE^E (this order contains 

 plants agreeing in important characters with the genus Hydrolea.) 

 D. Don, in edinb. phil. journ. July 1833. Choisy. in mem. soc. 

 phys. gen. 6. p. 106. Hydroleae, R. Br. cong. p. 32. Con- 

 volvulaceae, part. Juss. gen. 



Calyx 5-cleft; segments equal, usually distinct even to the 

 base, frequently spatulately dilated at top, permanent. Co- 

 rolla monopetalous, usually campanulate, 5-lobed at top. Sta- 

 mens inserted in the corolla, alternating with its lobes, sometimes 

 inclosed, and sometimes exserted. Styles 2, exceeding the 

 stamens ; stigmas thick or capitate. Ovarium 2-celled ; cells 

 many-seeded. Capsule 2-celled, loculicidal-2-valved ; dissepi- 

 ment fixed to the middle of the valves ; placentas 2 in each 

 cell, fixed to the middle of the dissepiment, sometimes spongy 

 and combined, sometimes laminaeform and separated. Seeds 

 very numerous, sessile on the placentas. Albumen fleshy. 

 Embryo straight. Annual, herbaceous, or shrubby plants. 

 Stems straight or diffuse, glabrous or downy, also very hispid, 

 rarely exceeding 2 feet in height ; with alternate branchlets. 

 Leaves alternate, simple, entire, or usually toothed, more or less 



VOL. IV. 



crowded, usually petiolate. Flowers corymbose or spicate, 

 sometimes also disposed in the manner of Heliotropium. 



This order is often combined with Concolvulacece, but is more 

 closely allied to Scrophularinece and Solaneae ; but it differs 

 from these orders, in the regular corolla, 5 stamens, and straight 

 embryo. 



Synopsis of the genera. 



1 HYDROLEA. Calyx 5-sepalled. Corolla rotately campanu- 

 late. Stamens inserted in the tube of the corolla. Stigmas 

 depressedly capitate. Capsule 2-celled ; placentas spongy, terete. 



2 HYDROLIA. Calyx 5-cleft. Corolla rotate. Stamens in- 

 serted in the lobes of the corolla. Capsule 2-celled, dehiscing 

 at top ; receptacles or placentas fleshy. 



3 NA'MA. Calyx 5-sepalled. Corolla tubularly funnel- 

 shaped. Stamens nearly inclosed. Stigmas bluntish. Capsule 

 2-celled ; placentas 4, laminaeform, at first joined by twos, 

 afterwards free. 



4 WIGA'NDIA. Calyx 5-sepalled. Corolla funnel-shaped. 

 Stamens exserted. Stigmas depressedly capitate. Capsule 2- 

 celled ; placentas like those of Kama. 



5 CODON. Calyx 10-12-parted. Corolla tubular; limb 10- 

 12-cleft. Stamens 10-12. Stigmas simple. Capsule 2-celled, 

 dehiscing at top ; dissepiment double, with seminiferous edges. 



I. HYDRO'LEA (from vlap, hydor, water ; and eXcua, elaia, 

 an olive ; in reference to the habitats of the species, and their 

 oiliness.) Lin. gen. no. 318. Gaertn. fruct. 1. p. 268. t. 55. 

 Juss. gen. 134. StSris, Lin. gen. edit. Reich. 342. Naraa 

 species, Lin. Sagonea, Aubl. guian. 1. p. 2S5. t. 111. Reiche- 

 lia, Schreb. gen. no. 512. 



LIN. SYST. Pentandria Digynia. Calyx permanent, of 5 

 sepals. Corolla rotately campanulate. Stamens inserted in the 

 tube of the corolla. Styles 2 ; stigmas depressedly capitate. 

 Capsule 2-celled ; dissepiment placentiferous in the middle ; 

 placentas terete, spongy. Annual or perennial plants, either 

 unarmed or spiny. Flowers panicled or corymbose, axillary or 

 terminal. 



1 . Plants unarmed. 



1 H. ZEYLA'NICA (Vahl, symb. 2. p. 46.) branched ; leaves 

 lanceolate, attenuated at both ends, glabrous ; panicles axillary, 

 branched, leafy ; sepals lanceolate-linear, clothed with viscid 

 down at the base. O-S. Native of the East Indies. Nama 

 Zeylanica, Lin. spec. p. 327. fl. zeyl. 117. 49. t. 2. Steris 

 Javana, Lin. mant. p. 54. syst. p. 264. Steris aquatica, Burm. 

 ind. p. 73. t. 39. f. 3. Attalerie, Poir. suppl. 1. p. 535. 

 Plukn. aim. 22. t. 130. f. 2. Anagallis Zejlanica, &c. Herm. 

 mus. zeyl. p. 36. Burm. zeyl. 19. Tsjeru-vallel, Rheed, mal. 

 10. p. 55. t. 28. Stem a little compressed, glabrous. Leaves 

 1-2 inches long. Peduncles usually opposite the leaves, downy, 

 viscid. Corollas blue, a little longer than the calyx. 



Far. /3; leaves finely ciliated above. () S. Native of 

 Java, about Bamtam. Hydrolea Javanica, Blum, bijdr. p. 725. 



Var. y ; stem downy at top ; flowers on short peduncles. 

 O- H. Native of Mexico. Steris villosa, Pav. ross. in herb. 

 Deless. 



Var. I ; plant quite glabrous ; flowers on short peduncles ; 

 peduncles in the forks ; sepals quite glabrous. Q.S. Native 

 about Rio Janiero. E volvulus, no. 1365, Burchell, mss. 



Ceylon Hydrolea. PI. 1 foot. ? 



2 H. INE'RMIS (Lour. coch. p. 172.) simple; leaves linear- 



K K 



