538 SCROPHULARINEJE. XXI. Boxxaxa. XXII. Hyproraicne, XXIII. HewraxTHUS. XXIV. Prerosticma. 
10 B. rzwurrüLrA (Spreng. syst. l. p. 42.) erect? leaves 
linear, quite entire; peduncles opposite the leaves; capsule 
linear, reflexed. ©. S. Native of Coromandel; Birmann 
Empire, at Tavoy ; Ceylon and China, in wet places. Gratiola 
tenuifólia, Colsm. grat. p. 8.  Corollas blue? 
Thin-leaved Bonnaya. PI. 1 to 3 foot. 
§ 2. BnacuvcaA'npz (from Bpayve, brachys, short; and rap- 
moc, karpos, a fruit.) Capsules ovate, exceeding the calyx a 
very little. Plants with the habit of Lindérnia. 
11 B. nyssoptorpes (Benth. in Wall. cat. no. 3866. scroph. 
ind. p. 84.) stem elongated, loose; leaves oblong or lanceolate, 
remote ; peduncles axillary, elongated, filiform; corolla 3 or 4 
times longer than the calyx. ©. S. Native of Hindostan, 
Silhet, China, Tranquebar. Gratiola hyssopioides, Lin. mant. 
p. 174. Koen. 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 Dopdtrium. 
Hyssop-leaved Bonnaya. | Pl. $ to 1 foot. 
12 B. rAnvirLóRA (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. ©.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. Pl. 3 foot. 
$ 3. SruxnocaA'nPA (from e$atpa, sphaira, a sphere; and 
xaptoc, 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 Vandéllia, 
with roundish capsules. 
13 B. rorunpiròLIa (Benth. scroph. ind. p. 34.) diffuse; 
leaves sessile, broad-ovate, subcordate; peduncles axillary ; 
capsules roundish, shorter than the calyx. ©. 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 débilis, Hayne, in Wall. cat. no. 3946. Mor- 
gania rotundifolja, Spreng. syst. 2. p. 803.—Rheed. mal. 9. p. 
111. t. 57. Flowers white. 
Round-leaved Bonnaya. Pl. 1 foot. 
14 B. pracuyca’rpa (Cham. et Schlecht. in Linnea, 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. 
©. S. Native of the East Indies. Glabrous. Habit of B. 
grandiflora. 
Short-fruited Bonnaya. Pl. decumbent. 
15 B. minima; 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. 
C. S. Native of the East Indies. Gratiola mínima, Roth, 
nov. spec. p. 8. 
Least Bonnaya. PI. 3 foot. 
+ Species doubtful or hardly known. 
16 B. puncra‘ra; leaves lanceolate, serrated, nerveless, dotted 
beneath; flowers sessile. ©. 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. 4 to 1 foot. 
17 B. Va’uu11; leaves oval, sessile, serrated, with cartilagi- 
nous edges, glabrous ; stem hispid; peduncles axillary, oppo- 
site. (9. S. Native of the East Indies, in springs. Gratiola 
pusílla, 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. ? . 
Vahl's Bonnaya. Pl. creeping. 
18 B. mrspr/pULA; leaves oval, sessile, crenated, and are, as 
well as the stem, pilose; peduncles axillary, opposite. ©.?S. 
Native of Java. Gratiola hispídula, 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. Pl. filiform. 
19 B. ocy«rróriA; leaves oblong, quite entire: lower ones 
petiolate; flowers racemose. ©.S. Native of the East In- 
dies. Gratiola ocymifdlia, Vahl, enum. 1. p. 96. Stem branch. 
ed at bottom. Lower leaves petiolate : upper ones remote, ses- 
sile. Capsule globose. 
Ocymum-leaved Bonnaya. PI. 1 to $ 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. HYDRO'TRICHE (from bwp tdpoc, hydor hydros, 
water; and Op rptxoc, thria 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 Limnóphila in the absence of the 
2 sterile stamens, or even the rudiments of them. 
1 H. morrowuEFLORA (Zucc.l.c.) 24. S. Native of Mada- 
gascar, in stagnant water. 
Hottonia-flowered Hydrotriche. Pl. aquatic, 1 to 2 feet. 
Cult. See Limnóphila, p. 543. for culture and propagation. 
XXIII. HEMIA'NTHUS (from én, hemi, half; and av6oc, 
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. 
Liw. syst. Didynàmia, Angiospérmia. Calyx tubular, 4- 
toothed, cleft on the under side. Upper lip of corolla obsolete: 
lower one 3-parted ; middle segment ligulate and truncate, muc 
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. wrcRANTHEMOTDEs (Nutt. l c.) 4. H. Native on 
the borders of the Delaware. 2 
Micranthemum-like Hemianthus. Pl. creeping. 
Cult. For culture and propagation see Herpéstis, p. 544- 
XXIV. PTEROSTI'GMA (from zrepov, pteron, a wing ; and 
ortypa, stigma; in reference to the stigma being generally 
girded by a wing.) Benth. scroph. ind. p. 20. 
Lin. syst. Didynamia, Angiospérmia. Calyx 5-parted, or 
deeply 5-cleft: upper segment the largest. Corolla bilabiate ; 
