604 OXI. VERBENACEX. (C. B. Clarke.) [ Congea. 
VAR. azurea; leaves elliptic acute more thinly hairy beneath, bracts oblong or 
narrowly oblong, calyx larger lobed half-way down teeth broadly lanceolate. C. 
azurea, Wall. Cat. 1733; Wight Ic. t. 1479, 1, fig. A. C. tomentosa var. oblongi- 
folia, Schauer l. c. 624, excl. syn. Roxb.—Pegu and Tenasserim, frequent ; Wallich 
M‘Lelland, &c. Cultivated in N. India. 
XXIII. AVICENNIA, Linn. 
Shrubs or small trees. Leaves opposite, entire coriaceous. Cymes 
contracted, or densely capitate heads peduncled, in the penultimate axils 
or in a trichotomous corymb; bracts and bracteoles small. Calyx ð- 
partite, unaltered in fruit; segments ovate, concave, deeply 1mbricate. 
Corolla-tube short-cylindric, limb spreading 5-4-lobed. Stamens 4, on the 
corolla-throat; anthers shortly exserted, ovate; cells parallel. Ovary 
imperfectly 4-celled by a 4-winged central column, 4-ovuled ; ovules pen- 
dulous between the wings of the central column; style long or short, tip 
bifid. Capsule broad, compressed, dehiscing by 2 thick valves, 1-seeded. 
Seed erect; embryo imperfectly clothed by its two integuments ; cotyledons 
large, plaited lengthwise; radicle inferior, villous. 
A. officinalis, Linn.; Schauer in DC. Prodr. xi. 700; leaves obovate 
or elliptic obtuse whitened beneath, corolla-limb glabrate yellow, style 
short. Bedd. For. Man. 174, and Anal. Pl. xx. fig. 25 Brand. For. Fi. 
371; Boiss. Fl. Orient. iv. 536. A. resinifera, Forst. ; Decne. m Nouv. 
Ann, Mus. iii. 402. A. tomentosa, Jacg.; Br. Prodr. 518; Roxb. FI. 
Ind. iii. 88; Wall. Pl. As. Rar. ii. 44, t. 271; Wight Ic. t. 1481; Griff. 
Notul. iv. 185; Kurz For. Fl. ii. 276.  Halodendron Thouarsii, Roem. 
& Sch. Syst. iii. 485.— Rwmph. Herb. Amb. ii. t. 70. Rheede Hort. 
Mal. iv. t. 45. 
Mangrove swamps of the Deccan PENINSULA and CRYLON, common; less 
frequent in the Malay Peninsula.—Distris. Malaya, Shores of the Indian and 
Pacific Ocean. . 
A shrub, or tree, 25 ft. Leaves 34 by 1j in., base tapering, beneath with hard 
tomentum or glabrate; petiole jin. Bract j, in., ovate; bracteoles similar, rather 
smaller. Calyx à in., minutely pubescent. Corolla } in.; lobes 4, ovate, acute, 
or one lobe shortly bifid, or lobes 5 subequal (not rarely all forms on one bush). 
Style distinct, sometimes nearly as long as the hairy ovary. Fruit lin. 
Van. alba, Blume Bijd. 821 (sp.); leaves lanceolate acute, style short or hardly 
any. Decne, l. c.; Wight Ic. t. 1482. A. resinifera, Griff. Notul. iv. 186, and in 
Trans. Linn. Soc. xx. 6, fig. 1. A. intermedia, Griff. i. c. A. officinalis, Kurz 
For, Fl. ii, 275.—Malay Peninsula; common, Distrib. Malaya, S.E. Asia, N. 
Aastralia, —Mr. Bentham considers the American and African A. tomentosa not 
specifically separable, 
Orver CXIL LABIATHE. (By J. D. Hooker.) 
Herbs, rarely shrubs, usually loaded with oil-glands. Stem usually 
4-gonous. Leaves opposite or whorled, stipules 0. Flowers irregular, 
solitary 2-nate or fascicled and axillary, or in centrifugal spicate cymes 
which by their union in pairs form false whorls. Calyx persistent, sub- 
regular, 4-5-cleft or 2-lipped. Corolla monopetalous, hypogynous; limb 
4-5-lobed or 2-lipped, lobes imbricate in bud. Stamens inserted in the 
corolla-tube, 4 didynamons, or the 2 upper imperfect. Axnther-cells connate 
or separate or confluent. Dise prominent. Ovary free, 2 of 9.celled carpels ; 
style simple, inserted between the lobes, stigma usually 2-fid; ovules one 
in each cell, erect, anatropous. Fruit of 4 dry or rarely fleshy 1-seeded 
lobes (nutlets) at the base of thecalyx, Seeds small, erect, albumen sparing 
