658 CXLV. CYCADACE^E. (W. T. Thiselton Dyer.) [Cycas. 



BUEMA ; dry forests of the Prorae district, Kurz ; Shan States, Aplln. Dis- 

 TEIB. Siam, Cochin China. 



Very close to C. pectinata, and perhaps only a geographical form. The' enlarged 

 base of the stem calls to mind the habit of some species of Dasylirion. Antheri- 

 ferous scales about f in. long, with a slender acumen of the same length. Carpo- 

 pliylls somewhat smaller than in G. pectinata, wholly tawny-villous when young ; 

 blade afterwards glabrescent above, marginal teeth above 1 in. long ; acumen about 

 2 in. long, flat from a broad base and spinous dentate in Burmese specimens, almost 

 subulate and entire in those from Cochin China. Seeds 1| long, obovoid-oblong 

 (Kurz). 



** Margins of leaflets revolute. 



5. C. Beddomei, Dyer in Linn. Trans. Ser. 2, Sot. ii. 85, t. 17 ; 



antheriferous scales long-acuminate, acumen in upper half of cone strongly 

 deflexed, blade of carpophyll ovate-lanceolate tapering into a long acumen 

 strongly dentate-lobate. C. revoluta, Bedd. For. Flor. 227 (not of 

 Thunl.}. 



E. MADEAS; abundant on Cuddapah and other hills, Beddome. 



A low shrub. Stems only a few inches high, clothed with the glabrescent closely 

 imbricated leaf-bases. Leaves about 3 ft. long, 9 in. wide, rachis subquadrangular ; 

 petiole about 6 in. long, strongly 4-anglecl, with a few minute teeth in upper third 

 clothed at base with a tufted tomentum ; leaflets about f in. wide, strongly revolute. 

 Male cone about 1 ft. long, 3 in. diam., very shortly peduncled; antheriferous scales 

 tapering acuminate from an oblong-deltoid base, ascending at the base of the cone, 

 strongly deflexed in the upper half or two-thirds. Carpophylls 6-8 in. long, with 

 two pairs of ovules above the middle ; blade 3 in. long, 1 in. wide. Seeds globose, 

 1-i in. diam. 



CLASS, MONOCOTYLEDONES. 

 * ORDER CXLVI. HYDROCHARIDEJE. 



Aquatic herbs. Leaves undivided. Flowers monoecious or dioecious, 

 enclosed in an entire or 2-leaved spathe, fern, solitary ; perianth superior. 

 Sepals 3, green or petaloid. Petals membranous or 0. Stamens 3-12, 

 anthers 2-celled. Ovary inferior, placentas parietal or projecting and 

 almost meeting; styles or style-arms 3-12; ovules anatropous or ortho- 

 tro-pous. Fruit rarely dehiscent, membranous or fleshy, few- or many- 

 seeded. Seeds exalbuminous, embryo various. 



Tribe I. Hydrillese. Fresh-water herbs; stem branching, leafy. 

 Spathes small, sessile. 



Leaves whorled. Perianth double. Ovules anatropous . . 1. HTDEILLA. 

 Leaves scattered. Perianth single. Ovules orthotropous . . 2. LAGAEOSIPHOK. 



Tribe II. Vallisneriese. Fresh-water herbs, stemless, or with stolons 

 only. Leaves sessile, long and narrow. Spathes on long scapes. 



Flowers unisexual. Perianth single 3. VALLISNEBIA. 



Flowers uni- or bi-sexual. Perianth double 4. BLYXA. 



Tribe III. Stratioteae. Fresh-water herbs, stemless or with a 

 creeping rootstock. Spathes pednncled. Perianth double. Leaves 

 various. 

 Flowers unisexual. Male spaines 2-3-fld. Ovary not beaked 5. HYDEOCHAEIS. 



