202 A FLORA OP MANILA 



C. pubescens (Willd.) Blume (Lauas, Tag.), is of wide distribution in 

 the Philippines, difering in many characters from the above, but es- 

 pecially in its leaves being pube scent beneath; it does not occur in our 

 area. The lotus (Nelumbium speciosimi~'Vl1ild.) {Baino, Tag.) occurs 

 in Laguna de Bay, and its flowers are occasionally sold in Manila. 



50. CERATOPHYLLACEAE (Ceratophyllum OR Inata 



Family) 



Submerged, slender, monoecious herbs growing in fresh water, the 

 leaves whorled, cleft into slender, toothed lobes. Flowers minute, axillary, 

 sessile, the perianth or involucre of 6 to 12, narrow, 2-fid segments. Male 

 flowers with 20 to 30 stamens. Female flowers with a sessile, ovoid, 

 1-celled ovary; style subulate; ovule solitary. Fruit a small, coriaceous, 

 ovoid or ellipsoid, compressed nut, terminated by the style. 



A single genus with 3 species of wid^ distribution in fresh water in 

 temperate and tropical regions of the world, a single species in the 

 Philippines. 



1. CERATOPHYLLUM Linnaeus 



Characters of the Family. (From the Greek "horn" and "leaf.") 



1. C. demersum L. Inata (Tag.). 



Stems long, branched, slender, submerged, densely leafy. Leaves 1.5 

 to 2.5 cm long, whorled, the segments spreading when submerged, linear, 

 toothed. Segments of the perianth subulate. Fruit variable, with two 

 horns at the base. 



Pasig River, not uncommon floating down from Lake Bay; widely 

 distributed in the Philippines. Most temperate and tropical regions. 



51. RANUNCULACEAE (Clematis Family) 



Annual or perennial often suffrutescent herbs, sometimes climbing. 

 Leaves opposite or alternate, simple or compound, entire, toothed, or lobed. 

 Flowers regular in our genera, perfect or 1-sexual. Sepals 6 or* more. 

 Rarely fewer, valvate or imbricate, deciduous, sometimes petaloid. Petals 

 none, or 3 to 5 or more, hypogynous, sometimes small. Stamens hypogy- 

 nous, usually many. Carpels usually many, free, 1-celled, each with 1 

 or more ovules. Fruit of numerous 1-seeded achenes, often tailed or 

 otherwise appendaged. 



Genera 30, species- about 1,100, in all parts of the world, 5 genera and 

 10 species in the Philippines, mostly at medium or higher altitudes. 



1. NARAVELIA DeCandolle 



Climbing, herbaceous or shrubby plants. Leaves opposite, 3-foliolate or 

 2-fpliolate, the terminal leaflet usually transformed into a tendril. Flowers 

 Mfillary, solitary or racemose, long-peduncl^d. Sepals 4 or 5. Petals 6 

 to 12, longer than the sepals. Achenes narrow, stipitate, beaked or 

 crowned with the long bearded styles. (Named from the "ancient city 

 of Gour" in Bengal.) 



Species 3, India to Malaya, 2 in the Philippines. 



1. N. loherl Merr. & Rolfe. 



A slender, herbaceous, slightly pubescent vine, becoming nearly or 

 quite glabrous. Leaves with 2, ovate to oblong-ovate, 5-nerved, somewhat 



