﻿424 LENTiBtJLARiE^ (Stapf). [Utricularia- 



dinal slits and several pores. Ovary more or less globose, 1-eelled; 

 style indistinct or distinct, but short, persistent ; stigma 2-lipped, 

 anticous lobe much larger than the often obscure posticous ; ovules 

 numerous, rarely few, sessile on the free-central, fleshy placenta, 

 anatropous. Capsule usually globose, breaking up into 2 valves or 

 dehiscing irregularly. Seeds globose, ovoid, lenticular, hemi-elliptic, 

 truncate-pyramidal or prismatic, smooth, reticulate, tubercled, 

 glochidiate, or variously winged, usually very small, exalbuminous ; 

 embryo undiflferentiated, with or without obscure rudiments of the 

 primary leaves, rarely with a plumule of 9-12 more or less subulate 

 primary leaves. 



Rootless aquatic or terrestrial or epiphytic herbs, nearly always provided with 

 minute bladder-like organs for the capture and digestion of small organisms, 

 annual or perennial with or without a resting season ; the aquatic species repro- 

 ducing themselves frequently from special resting buds (hibernacles), and the 

 epiphytic sometimes from tubers. Terrestrial and epiphytic species : Primary 

 axis developed, terminated by an inflorescence, and producing at the base above 

 the small primary leaves a rosette of foliage leaves (rarely a solitary foliage-leaf) 

 and non-axillary stolons, leaves and stolons without definite sequence and passing 

 sometimes into each other. Stolons growing with rolled-in or straight tips, 

 either developed as rhizoids (growing downwards into the substratum and 

 resembling roots) or creeping on or close to the surface of the substratum, often 

 among moss and dwarf herbage, more or less branching and producing bladders, 

 foliage-leaves and (from certain of their axils) flowering or much-stunted barren 

 shoots with a more or less developed basal tuft or rosette of leaves and stolons. 

 Leaves petioled, normally always entire, linear or orbicular or renifonn, rarely 

 peltate, often decayed at the time of flowering, frequently producing bladders, 

 stolons or adventitious shoots. Aquatic species : Primary axis arrested (accord- 

 ing to Goehel), producing above or among the primary leaves one or several 

 stolons. Stolons floating in still water or creeping on mud, rarely attached to 

 stones and rocks in running water, often very long, growing with rolled-in tips, 

 branching ; branches either all alike and resembling the primary stolons, pro- 

 ducmg from the flanks alternate or occasionally subopposite leaves and axillary 

 orjuxta-axiliary inflorescences, or branches heteromorphic, some of them grow- 

 ing downwards and producing only much reduced leaves and bladders. Leaves 

 more or less divided into filiform or capillary segments j primary segments of 

 the large-leaved species often imitating a whorl or half-whorl of pinnate leaves 

 (rays), pmnae more or less 2-seriate on the sometimes broadened midrib, usually 

 torked at the base, each division again divided, 1-2 outer rays sometimes 

 replaced by a hyaline cordate or reniform or more or less divided auricle, 

 resembling a stipule ; all or certain leaves or the leaves of certain branches 

 producmg bladders, usually in the place of leaf-segments. Bladders globose to 

 ovoid, stalked, with an oblique subterminal or subbasal mouth, closed by a 

 membranous flexible valve and a turned-in thickening {chin) of the lower rim, 

 sometimes produced into an upper or an upper and lower lip, ciliate, fimbriate or 

 tarnished with stouter, variously shaped processes (tentacles). Inflorescences 

 racemose, bracteate, peduncled, those of certain aquatic species held above water 

 A ^ ^?°''^ °^ modified spongy leaves (floats); lower bracts often barren, 

 adpressed; bracteoles 2, at the base of the pedicel, or 0. 



IJiSTEIB. Over 100 species, mainly in the tropics of both hemispheres. 



i He morphology of the vegetative parts of Uiricularia is extremely com- 

 plicated on account of the great plasticity of the organs and their readiness for 

 sprouting. A very valuable account of those conditions was given by Dr. Goebel 

 m llora, 1889, 291-297, and 1904, 98-126, in his " Morphologische und biolo- 

 giscAe btudien," No. V. (in ^nn. Gard. Bot. Buitenz., ix. 41), and in bis 



urganographie der Pflanzen," 112. 586, but these publications concern mostly 

 nou-Atrican species. 



