348 
41. TJAIBELLACEiE. 
3. Helosciadiuxe Koch. 
1. H. nodiflorum (L.). Rabaga. 
St. procumbent rooting at the base ; 1. pinnate, lfts. ovate or 
ovate-lanceolate equably serrulate ; umbels opposite to the 1. 
nearly sessile or longer than their ped. which is much shorter 
than either 'their rays or the opposite petiole ; gen. inv. 0 or 1-2- 
leaved deciduous. — DC. iv. 104 (excl. varr. (3, y) ; WB. ii. 149 ; 
Koch 312 ; Bab. 141 (excl. var. (3). Sium nodiflorum L. ; Buch 195. 
no. 295 ; EB. t. 639; Sm. E. FI. ii. 57. Sison nodiflorum Brot. i. 423. 
Apium nodiflorum RFG. 1. 1846. — Herb. per. Mad. reg. 1, 2, 3, ccc. 
Edges of streams and watercourses almost everywhere ; Levada 
de S ta Luzia, Rib. dos Cayados, de Machico, at Porto da Cruz, S ta 
Amia, S. Vicente, Magdalena, &c. May- J uly ; but at most seasons. 
— Very variable in size and luxuriance with succulent fistidose 
st. from 2 or 3 in. to 2 ft. in length forming large beds or patches 
and rooting only at the lowest joints, the ends ascending. 
Branches remote forked straggling. Whole pi. smooth of a 
bright shining gr. All but the uppermost 1. with long petioles. 
Lfts. opposite sessile rather large about an in. long, those of the 
lower 1. occasionally lobed. FI. minute inconspicuous dull green- 
ish-w. in small shortly stalked inconspicuous not confluent late- 
ral umbels of 5-8 unequal rough and angular primary rays (which 
are in. long) and considerably more numerous secondary 
forming little separate remote heads. Partial inv. persistent 
about 6 rather broadly lanceolate leaflike and conspicuous with 
broad membranous whitish margins. Gen. inv. very rarely pre- 
sent in Mad. and then of one leaf shaped like the partial. Styles 
short but twice as long as stylopod. Fr. small broadly ovoidal 
short. 
The 1. and st. are eaten occasionally by the country people like 
water-cresses. 
The nearly allied true II. repens (L. fil.) Koch 312, RFG. 
t. 1845. f. iii, distinguished by its rounded lfts, umbels with ped. 
longer than their rays and 3-5-leaved persistent gen. inv., has not 
occurred in Mad., nor have I ever observed the var. II. nodiflo- 
rum (3. ochreatum DC. 1. c., intermedium Coss. ct Germ. FI. 
(ed. i.) i. 208, said to be “ exactly intermediate between II. nodi- 
florum and repens with a slender prostrate rooting st., umbels 
more or less stalked, with their ped. sometimes longer than the 
rays and gen. inv. 0 or 1-2-leaved, ” though found, according to 
Seub. FI. Az. 42, in Terceira one of the AQores. 
