294 
Domin, Zwei neue Umbelliferen-Gattungen. 
und schwer zugängliche Originaldiagnose 1 ) aus Wings South 
Science Rec. 1, c. lassen wir nachstehend folgen: 
Annual, minute, except the fruit glabrous; stipules lacerated; 
leaves in outline cordate- or renate-roundish, to the middle or less 
deeply cleft into three or five lobes, besides somewhot crenated; 
umbels with several closely crowded very minute flowers; stalk 
as long as the umbel or extending to thrice its length; involu- 
crating bracts linear-setaceous, as well as the flower-stalklets very 
short; styles extremely minute; fruits didymous roundish, much 
compressed; vallecule between the carinal edge and the semi¬ 
circular lateral nerve of each mericarp densely fringend; their 
lateral areole ample, dimidiate-orbicular, smooth or rarely papilli- 
gerous, only slightly impressed; carpophore permanentiy adnate 
and undivided. 
2. Homalosciadium Dom. nov. gen. 
(Tab. fig. 1—3.) 
Floribus longiuscule pedicellatis in umbellas multifloras sim- 
plices conjunctis, involucri bracteis minutissimis vel inconspicuis, 
calycis dentibus indistinctis, disco parvo, stylis brevissimis, sta- 
minibus parvis brevibus, petalis albis minutis latis obtusis^ in 
gemmä subimbricatis, fructu late oblongo sponte bipartibili a 
lateribus plane compresso, mericarpiis glabris ad commissuram 
angustissimam constrictis, faciebus enervosis laevibusque, opacis 
quinquejugis, jugis omnibus primariis, lateralibus saepe subobso- 
letis aut in commissura latentibus, intermediis dorsali valde ap- 
proximatis faciemque dorsalem perangustam marginantibus et cum 
jugo dorsali plus minusve transverse ruguloso-conjunctis, vittis nullis, 
carpophoro libero persistenti ad tertiam partem usque supra 
medium bifido. 
Planta annua glabra caulibus sympodice compositis, foliis 
basi cuneata in petiolum sensim abeuntibus, stipulis vaginisquc nullis. 
Species unica, australiensis: 
H. verticillatum Dom. 
Synonyma: 
Hydrocotyle verticillata Turcz. in Bull. Soc; Nat. Mose. XXII. 
(1849) II. 28. 
H. homalocarpa F. Muell. Fragm. Phyt. Austr. II. 129 
(1860—1861). 
Centella homaloccirpa Drude in Engl er s Pfianzenfam. III. 8. 
120 (1898). 
Planta annua modo tantum 2-3 cm alta interdum altitudinem 
20 cm superans, caulibus plerumque erectis rarius prostratis haud 
raro maxime ramosis vix angulosis tenuibus glabris foliatis. Foliis 
subaequaliter distantibus plerumque 3—4 verticillatis, uno majori, 
2—3 minoribus umbellas fulcrantibus eo verticillatim appropinquatis, 
omnibus basi cuneata in petiolum iis aequilongum usque duplo 
1 ) Auch Diels und Pritzel, die besten Kenner der westaustralischen 
Flora, sagen 1. c.: „Cuius speciei fructu pulcherrime ciliato insignis de- 
scriptionem nunquam ad lucem prodiisse putamus“. 
