538 SCROPHULARINE^;. XXI. BONNAYA. XXII. HYDROTRICHE. XXIII. HEMIANTHUS. XXIV. PTEROSTIGMA. 



10 B. TENUIFOLIA (Spreng. syst. 1. p. 42.) erect? leaves 

 linear, quite entire ; peduncles opposite the leaves ; capsule 

 linear, reflexed. 0. S, Native of Coromandel ; Birmann 

 Empire, at Tavoy ; Ceylon and China, in wet places. Gratiola 

 tenuifolia, Colsm. grat. p. 8. Corollas blue ? 



Thin-leaved Bonnaya. PL | to J foot. 



2. BRACHYCA'RP^: (from Ppa-xyg, brachys, short; and rap- 

 ?roe, karpos, a fruit.) Capsules ovate, exceeding the calyx a 

 very little. Plants with the habit of Lindernia. 



11 B. HYSSOPIOIDES (Benth. in Wall. cat. no. 3866. scroph. 

 ind. p. 34.) stem elongated, loose ; leaves oblong or lanceolate, 

 remote ; peduncles axillary, elongated, filiform ; corolla 3 or 4 

 times longer than the calyx. Q. S. Native of Hindostan, 

 Silhet, China, Tranquebar. Gratiola hyssopioides, Lin. mant. 

 p. 174. Keen, in Retz. obs. 4. p. 8. Roxb. cor. 2. p. 16. t. 

 128. fl. ind. ed. Car. 1. p. 142. Morgania hyssopioides, Spreng. 

 syst. 2. p. 803. Corollas pale blue. Sterile stamens bearded. 

 Habit of a species of Dopatrium. 



Hyssop-leaved Bonnaya. PI. J to 1 foot. 



12 B. PARVIFLORA (Benth. in Wall. cat. no. 3867. scroph. 

 ind. p. 34.) humble, branched ; leaves oblong or lanceolate ; 

 flowers axillary or subracemose ; corolla twice the length of the 

 calyx. Q. S. Native of Hindostan, Silhet, and the Birmann 

 Empire. Gratiola parviflora, Roxb. corom. 3. p. 3. t. 203. 

 Flowers small, usually blue, but sometimes white. Sterile fila- 

 ments capitate at apex. 



Small-flowered Bonnaya. PI. J foot. 



3. SPH:ROCA'RPA (from <r<j>aipa, sphaira, a sphere ; and 

 capTToe, karpos, a fruit ; in reference to the capsules being 

 roundish.) Benth. scroph. ind. p. 34. Capsules roundish, 

 shorter than the calyx. Similar to the species of Vandellia, 

 with roundish capsules. 



13 B. ROTUNDIFOLIA (Benth. scroph. ind. p. 34.) diffuse ; 

 leaves sessile, broad-ovate, subcordate ; peduncles axillary ; 

 capsules roundish, shorter than the calyx. 0. S. Native of 

 the Indian Peninsula and Ceylon, in moist places. Gratiola 

 rotundifolia, Lin. mant. p. 174. Roxb. fl. ind. ed. Car. 1. 

 p. 138. Gratiola debilis, Hayne, in Wall. cat. no. 3946. Mor- 

 gania rotundifolia, Spreng. syst. 2. p. 803. Rheed. mal. 9. p. 

 111. t. 57. Flowers white. 



Round-leaved Bonnaya. PI. \ foot. 



14 B. BRACHYCA'RPA (Cham, et Schlecht. in Linnaea, 2. p. 

 568.) stem decumbent ; leaves oblong, bluntish, generally tri- 

 dentate on both sides, narrowed at the base ; peduncles shorter 

 than the leaves ; capsule about equal in length to the calyx. 

 O- S. Native of the East Indies. Glabrous. Habit of B. 

 grandiflora. 



Short-fruited Bonnaya. PI. decumbent. 



15 B. MI'NIMA ; stem filiform, erect, simple; leaves oblong, 

 sessile, remote, serrulated, and are, as well as the calycine seg- 

 ments, ciliated ; capsule oblong, rather longer than the pedicels. 

 . S. Native of the East Indies. Gratiola minima, Roth, 

 nov. spec. p. 8. 



Least Bonnaya. PI. \ foot. 



j" Species doubtful or hardly known. 



16 B. PUNCTA V TA ; leaves lanceolate, serrated, nerveless, dotted 

 beneath; flowers sessile. Q. S. Native of Java. Gratiola 

 punctata, Colsm. grat. Vahl, enum. 1. p. 90. Stem erect, 

 creeping at the base, quite simple. Leaves sessile, half an inch 

 long. Flowers solitary, opposite. Capsule roundish, a little 

 compressed, length of calyx. 



Dotted Bonnaya. PI. | to | foot. 



17 B. VA'HLII; leaves oval, sessile, serrated, with cartilagi- 



nous edges, glabrous ; stem hispid ; peduncles axillary, oppo- 

 site. . S. Native of the East Indies, in springs. Gratiola 

 pusilla, Willd. spec. 1. p. 105. Vahl, enum. 1. p. 105. Stem 

 simple or branched. Peduncles twice as long as the leaves. 

 Segments of the calyx linear, acute. Flowers small, blue. 

 Capsule globose. 



Void's Bonnaya. PI. creeping. 



18 B. UISPI'DULA ; leaves oval, sessile, crenated, and are, as 

 well as the stem, pilose; peduncles axillary, opposite. . ? S. 

 Native of Java. Gratiola hispidula, Commers. in Vahl. enum. 

 1. p. 94. Stem filiform, bifid at apex. Leaves a nail in length, 

 acute, 5-nerved beneath. Peduncles glabrous, longer than the 

 leaves. Calycine segments linear-lanceolate. Capsule globose, 

 almost the size of a coriander seed. 



Hispid Bonnaya. PI. filiform. 



19 B. OCYMIFOLIA ; leaves oblong, quite entire: lower ones 

 petiolate ; flowers racemose. . S. Native of the East In- 

 dies. Gratiola ocymifolia, Vahl, enum. 1. p. 96. Stem branch- 

 ed at bottom. Lower leaves petiolate : upper ones remote, ses- 

 sile. Capsule globose. 



Ocymum- leaved Bonnaya. PI. 5 to g foot. 



Cult. The seeds of all the species should be reared on a hot- 

 bed ; and when the plants are of sufficient size, they should be 

 planted in separate pots, which should be either kept in a hot- 

 bed, or placed in the stove, in deep pans filled with water. 



XXII. HYDROTRICHE (from (/Swp Mpoe, hydor hydros, 

 water ; and 0p< rpt^oe, thrix trichos, a hair ; in reference to 

 the hair-like, submersed leaves, and habitation of the plant.) 

 Zucc. abhandl. acad. wiss. 1829, 1830. vol. I. p. 308. 



LIN. SYST. Didndria, Monogynia. Calyx 5-parted, nearly 

 equal. Corolla regular, funnel-shaped ; limb 5-cleft. Stamens 

 2 ; anthers connected by hairs. Ovarium 2-celled ; placentas 

 one in each cell, adnate to the dissepiment, many-ovulate. 

 Stigma bilabiate, or bilamellate. Capsule unknown. An aquatic 

 herb. Lower or submersed leaves verticillate, capillaceously 

 multifid, setosely serrated : superior ones opposite, lanceolate, 

 obtuse. Flowers disposed in few-flowered racemes. This 

 genus is distinguished from Limnophila in the absence of the 

 2 sterile stamens, or even the rudiments of them. 



1 H. HOTTONIJEFLORA (Zucc. 1. c.) ! . S. Native of Mada- 

 gascar, in stagnant water. 



Hottonia-flonered Hydrotriche. PI. aquatic, 1 to 2 feet. 



Cult. See Limnophila, p. 543. for culture and propagation. 



XXIII. HEMIA'NTHUS (from >, hemi, half; and 

 anthos, a flower ; in reference to the upper lip of corolla being 

 obsolete.) Nutt. gen. amer. 2. p. 42. journ. acad. nat. sc. phil. 

 1. p. 119. t. 6. f. 2. 



LIN. SYST. Didynamia, Angiospermia, Calyx tubular, 4- 

 toothed, cleft on the under side. Upper lip of corolla obsolete: 

 lower one 3-parted ; middle segment ligulate and truncate, much 

 longer, closely incurved. Stamens 2 ; filaments bifid ; lateral 

 clefts antheriferous. Style bifid. Capsule 2-valved, many- 

 seeded. Seeds ovate, even, and shining. A small creeping 

 plant, growing in marshes. Leaves entire, opposite and verticil- 

 late. Flowers solitary, alternate, pedicellate, minute. 



1 H. MICRANTHEMOI'DES (Nutt. 1. c.) If. . H. Native on 

 the borders of the Delaware. 



Micranlhemum-like Hemianthus. PI. creeping. 



Cult. For culture and propagation see Herpestis, p. 544. 



XXIV. PTEROSTI'GMA (from irrtpov, pleron, a wing ; and 

 tTTf/pa, stigma ; in reference to the stigma being generally 

 girded by a wing.) Benth. scroph. ind. p. 20. 



LIN. SYST. Didynamia, Angiospermia. Calyx 5-parted, or 

 deeply 5-cleft : upper segment the largest. Corolla bilabiate ; 



