78 Anton K. Schindler. — Halorrhagaceae. 



vel rudimentariis nonnunquam 2-meri, lobis tunc 0, petalis staminibusque 2, antheris 

 late ellipticis vel late linearibus; fl. Q petalis rudimentariis, staminibus 0. — Herbae 

 aquaticae vel limosae, glabrae, simplices vel ramosae. Folia opposita vel alterna vel 

 in speciebus aquaticis saepissime verticillata tunc pinnata; emersa pinnatipartita vel 

 serrata vel dentata vel integerrima, linearia usque ad suborbicularia. Flores saepissime 

 in foliorum axillis singuli, rarius in dichasia axillaria paueiflora dispositi vel flore unieo 

 seriali-descendente tunc foemineo aueti; si coenomonoiei inömi Q medii £$ summi q*. 

 Species ad 40, fere per totum orbem dispersae. 



Conspectns subgenerum, sectionuni, subsectionum, specierum, Tarietatam. 



A. Flores hermaphroditi vel reduetione unisexuales, stamina 8 

 vel 4 antheris late linearibus non ellipticis, fruetus 4-partitus 



Subgen. I. Eumyriophyllum Schindler 



a. Stamina 8 Sect. a. Pentapteris P. DC. emend. 0. Ktze. 



a. Folia opposita vel alterna nunquam verticillata. 



I. Folia omnia alterna, nunquam opposita; calycis lobi 



0. petala lata basi inserta; species omnes austra- 



lienses Subsect. a. Spirophyllum Schindler 



\. Flores in bractearum axillis semper singuli, 



folia infima certe pinnata, antherae zb \ ,5 mm 



longae. 



* Folia omnia, etiam florifera pinnatipartita 

 bracteolae trianguläres basim versus serratae 

 ± 1,0 mm longae et 0,2 mm latae, petala 

 zb 3,0 mm longa, styli in fruetu minute pa- 

 pillosi, fruetus —1,1 mm longus merocarpiis 



compressis \. M. gracile. 



** Folia summa integra, bracteolae ovato-lanceo- 

 latae subintegrae zb 0,3 mm longae et 0,1 mm 

 latae, petala zb 2,5 mm longa, styli in fruetu 

 dense longeque papillosi , fruetus 0,5 mm 



longus, merocarpiis rotundato-compressis . . 2. M. trachycarpum . 

 2. Flores in bractearum axillis 1 — 4 ni fasciculati, 

 folia omnia integerrima, antherae zb 2,0 mm 

 longae, bracteolae lanceolatae minute serratae 

 zb 0,5 mm longae et 0,15 mm latae, petala 

 db 3,0 mm longa, fruetus dz 0,5 mm longus. 3. M. filiforme. 

 II. Folia infima certe opposita, omnia integerrima 



Subsect. ß. Pelonastes Hook. f. emend. Schindler 



1 . Folia summa alterna, calycis lobi adsunt . . 4. M. tillaeoides. 



2. Folia omnia opposita. 



* Folia linearia, bracteolae ex ovato acuminatae, 

 fruetus plerumque breviter pedicellatus. 



f Folia 30 mm longa, valde remota, flores 



summi 6 — \ masculi 5. M.longitrracteolatum. 



ff Folia 3,5 — 9,0 mm longa, dense disposita, 



flores 2 summi masculi 6. M. peduneulatum. 



** Folia anguste oblonga vel obovata, bracteolae 

 trianguläres vel triangulari-lanceolatae, fruetus 

 plane sessilis. 

 f Folia anguste oblonga, summa oblongo- 



cochleiformia zb 2,2 mm longa et 0,5 mm 



lata, calycis lobi 0, flores summi 2 — 4 tf 7. M. Votscliii. 



