520 CY. PODOSTEMONACE,^:. 



1. LAWIA, Qi-m. 



Herbs growiug on smooth rocks in rapids and waterfalls. Thallus 

 closely attached to the rock, frondose, branched, rootless. Leaves 

 usually in rosettes on the upper surface of the thallus, very numerous, 

 simple, entire, usually acute, green or red with \\hitish median line, 

 easily detached and broken. Flowers numerous at the apices of the 

 lobes of the thallus (rarely on the upper surface), solitary, on pedicels 

 emerging from terminal axial leafy cupules. Perianth 3-fid, regular, 

 imbricate, membranous, brownish, marcescent. Stamens 3, hypogynous, 

 alternating with the perianth-segments ; anthers 2-celled, opening longi- 

 tudinally. Ovary superior, ellipsoid, obtuse, more or less 3-angled, 

 3-celled ; ovules numerous, anatropous, with a thick axile placenta ; 

 septa very thin ; stigmas 3. Capsule more or less enclosed in the 

 persistent perianth, ellipsoid or obovoid, 9-ribbed, 3-celled, septifragal ; 

 valves 3, equal, opposite the perianth-segments, incurved after de- 

 hiscence. Seeds numerous, minute ; outer layer of testa sticky when 

 wetted ; cotyledons crumpled. — Distrib. Species 1, S. India and 

 Ceylon. 



It is scarcely cecessary to make any apology for restoring the original name of this 

 genus, which was so named in honour of Mr. Law of the Bombay Civil Service, wiiose 

 labors in the cause of botanical science are well known. The name Lmvia was given 

 to the genus by Tulasne from Griffith's maTuiscript and first published by him in 1849 

 (Ann. Sc. Nat. ser. 3, v. 11, p. 112). In his Monogr. Podost. (1852) p. 189, as the 

 generic name Lawia had been already given to a Eubiaceous genus by Wight in 1847, 

 Tulasne substituted the name Terniola for Lcncia. Wight's Lawia has been since 

 reduced to Adenosachme, so that there can be no reason why the original name should 

 not be restored. Warming, Trimen, Willis, &c. have adopted it. 



1. Lawia zeylanica, Tulasne, in Ann. Sc. Nat. ser. 3, v. 11 (1849) 

 p. 112 ; Trim. M. Ceyl. v. 3, p. 416 ; Willis, Eev. Podost. Ind. & Ceyl. 

 in Ann. Eoy. Gard. Peradeuiya, p. 213. Lawia j)uIcJiella, Tul. 1. c. p. 113. 

 L. longipes, Tul. 1. c. p. 113. Tulasnea all species ramosissima excepted, 

 AVight, Icon. tt. 1919, 1920. Dalzellia all species ramosissima excepted, 

 Wight, Icon. V. 5, part 2, p. 35. Terniola zeylanica, Tul. Monogr. 

 Podost. (1852) p. 190, t. 13, fig. 3; Hook. f. PI. B. I. v. 5, p. 62. 

 T. jmlchcUa, Tul. Monogr. Podost. p. 192; Dalz. & Gibs. p. 245; PI. 

 B. 1. V. 5, p. 62; Woodr. in Journ. Bomb. Nat. v. 12 (1899) p. 366. 

 T. Lavii, Dalz. & Gibs. Bo. PI. (1861) p. 245; Wedd. in DC. Prodr. 

 V. 17 (1873) p. 47; PI. B. I. v. 5, p. 63; Woodr. 1. c. T. lonqipes. 

 Tub Monogr. Podost. p. 193, t. 13, fig. 2; Dalz. & Gibs. 1. c. ; Pl.B. I. 

 V. 5, p. 63; AVoodr. 1. c. T. pedrivcidosa, Dalz. & Gibs. 1. c. ; Wedd. 

 1. c. ; PL B. I. 1. c. ; Woodr. 1. c. T. foliosa, Dalz. & Gibs. 1. c. ; Wedd. 

 1. c. ; PI. B. I. 1. c. ; AVoodr. 1. c. 



A'ah. ]. malalarica, Willis, 1. c. p. 215. Thallus frondiform, 6 in. or 

 more in diam., with frequent branching and ribbon-like or flabcllii'orm 

 lobes, thick and hard. Leaves ^-j, in. long or more, linear. Plowers 

 numerous, closely crowded along the edges of the thallus emerging fi-oin 

 short cupules ; fruiting pedicels variable, avernging about J in. long. 

 Piuit obovoid or ellipsoid, -^V'tV "^- ^*^"S ^^''*'' ^^''" ^'"'^^ ^^^^^ marked 

 depressions between the carpels. Seeds yelloMish-brow n. 



Ka.naua : on the Ivjila naddi. 



