186 THE JOURNAL OF BOTANY 
(e.) Fruit characters; an important help in distinguishing true 
nodiflorum from true repens. Further ae and See eee 
of fruit characters are much to be de 
(/.) The size and habit of the shole plant. 
Of the literature of the subject, the following i is the most worthy 
of attention :—Jacquin (Fl. Austr. t. 260, 1775) es a Pe de- 
i olle 
1830) he transferred the variety to Helosciadium Sates the 
genus Helosciadium having been founded by Koch in 1824 (Nov 
Act. Nat. i 26). F. Schultz in Bonplandia (ii. 287, 
depressum, and longipedunculatum. We must ath mention the 
figures of Reichenbach (Icones FI. Germanica, xxi. MDccoLY. and 
MDCOCLYI. (** mpcccxzy1.’’), and the admirable deuebaorts of Grenier 
and Godron (Fl. de France, i. 735). The descriptions of the 
varieties in Rouy & ae d’s Fl. de France (vii. 868) do not serve 
We have cdiigalead on material in the National Herbarium, 
ware contains the specimen from which t. 1481 of English Botany 
as drawn, and also specimens of var. longipedunentlatum from the 
te locality. We are indebted to M. Casimir De Cando ios for 
sending us a photograph ¢ the type of var. ochreatum DC. preserved 
in the Candollean Herbar lum at Geneva ; this is partly pice she’ 
in the accompanying plate. 
We hay. wn up the following clavis indicating some of the 
main points of distinction ; this i 1s followed by dia agnoses of + 
forms which appear ar to us worthy of description, and which 
recognize as occurring in Britain ;— 
A. Involuere 0 or 1 or 2 b; racts, in var. longipedun- 
culatum Schultz sometimes 8. 
a. Peduncle 0 or short. Plant rooting at base 
only, stout. Leaflet ne elliptical-lanceo- 
Var. vulgare Schultz. 
8. Pedunele always present, sometimes attaining 
the length of the r 
* Roots at snet of the nodes. Leaflets 
5-7, sublanceolate Var. ochreatum DC. 
** Small plant, rooting at all the nodes 
i = ae : , broadly ov ate 
otun I. pseudo-repens H. CO. Watson. 
y- Pedunele long. Stem slender, elongate. Lea 
Var t longipednculatum Schultz. 
B. ea ore of 3-7 bracts, Leaflets 9-1 si 
= cle long epens (Koch). 
“Wee 
- HeLosctapium weeiyLonti Kosh, Le ¢. 126; = Sty English 
Botany, at iil. iv. 100. 
m nodifiorum Li. Sp. Pl, 251 (1758), and Herb. ! 
Reichb, 
Ayla nodiflorum fil. Ic, Flor. Germ. et Helv, xxi, 10, 
t. 1856 (1846), 
