604 cxi. vERBENACE-as. (C. B. Clarke.) [Congea. 



VAB. 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 1. c. 624, excl. syn. Roxb. Pegu and Tenasserirn, frequent; Wallich 

 M'Lelland, &c. Cultivated in N. India. 



XXIII. AVXCENNXA, 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 5- 

 partite, unaltered in fruit; segments ovate, concave, deeply imbricate. 

 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. 2 ; Brand. For. Fl. 

 371 ; Boiss. FL Orient, iv. 536. A. resinifera, Forst. ; Decne. in Nouv. 

 Ann. Mus. iii. 402. A. tomentosa, Jacq. Br. Prodr. 518 ; Roxb. FL 

 Ind. iii. 88 ; Wall. PL As. Ear. iii. 44, t. 271 ; Wight Ic. t. 1481 ; Griff. 

 Notul. iv. 185; Kurz For. FL ii. 276. Halodendron Thouarsii, Eoem. 

 & Sck. Syst. iii. 485. Rumph. Herb. Amb. iii. t. 76. Rheede Sort. 

 Mai. iv. t. 45. 



Mangrove swamps of the DECCAN PENINSULA and CEYLON, common; less 

 frequent in the Malay Peninsula. DISTEIB. Malaya, Shores of the Indian and 

 Pacific Ocean. 



A shrub, or tree, 25 ft. Leaves 3 by 1^ in., base tapering, beneath with hard 

 totnenturn or glabrate ; petiole \ in. Bract -^ in., ovate ; bracteoles similar, rather 

 smaller. Calyx in., minutely pubescent. Corolla f 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 1 in. 



VAE. alba, Blume Bijd. -821 (sp.) ; leaves lanceolate acute, style short or hardly 

 any. Decne. 1. 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. 

 Australia. Mr. Bentham considers the American and African A. tomentosa not 

 specifically separable. 



ORDEB CXII. LABIATJE. (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 didynamous, or the 2 upper imperfect. Anther-cells connate 

 or separate or confluent. Disc prominent. Ovary free, 2 of 2-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 the calyx. Seeds small, erect, albumen sparing 



