684 
BIDENS procera. 
Mr. Lambert's Bidens. 
— 
SYNGENESIA POLYGAMIA FRUSTRANEA. 
Nat. ord. Comrosırz. Adanson fam. 2. 103. 
CORYMBIFERE. Jussieu gen. 177. Dio. VI. 
. SYNANTHEREEÆ. Cassini im dict. sc. nat. 10. 131, segg. 
Tribus IX. HELIANTHES. fd. loc. cit. 20. 360. Sect. IL. HELIANTHEX 
COREOPSIDEE. Germ. plerdmque 4-gonum transversè compressum; pap- 
pus, paleæ nonnulle crasse rigide plerümque triquetre, germini firmiter 
affixe. Id. loc. cit. 347; (ex gall. vers.) 
BIDENS. (CorBorsınag species complures. Auctorum.) Involucrum 
(calyx) polyphyllum: foliolis düplici serie dispositis; exterioribus sæpiès 
longioribus, difformibus et patentibus. Recept. planum, paleaceum. Fios- 
culi disci tubulosi, hermaphroditi; radii.ligulati, neutri, rariùs nulli. Ache- 
nia (semina) quadrangülari-compressa, bi-aut quinque-aristata: aristis per- 
sistentibus, retrorsöm hamosis. Herbe ramis foliisque“oppositis, integris, 
incisis aut varie partitis. . Flores terminales, solitarii aut corymbosi: radio 
sepissime flavo, rar albó. Kunth nov. gen. et sp. Pl. 4. 230. 
e 
B. procera, stricta, ramosa; foliis decursivè bi-tripinnatis, pinnulis linearibus 
acutis canaliculatis integris (nec serratis) flaccidis : florë radiato; calycis 
foliolis exterioribus linearibus obtusis pubescentibus; germinibus cuneir 
formibus transversé compressis, biaristatis. Don MSS. " 
Coreopsis „angustifolia. | Pavon sub exemplari spontaneo Herbarii Lam- 
tiani. 
Herba biennis, orgyalis v. ultrà: caules plures solidi, strictissimi, obtusè 
4-goni, striati, glabri, diametro 2. - lineari, foliosi, suprà ramoté: yamis 
erectis oppositis teretiusculis. Folia numerosa, opposita, glabra, saturate 
virentia, 3-7-xncialia; summa decursivè pinnata, Wferioru bi- v. subtripine 
nata, pinnis oppositis, pinnulis angustis linearibus acutis oppositis subalter- _ 
nisve integris (non dentatis) flaccidis 1-nerviis subcarnosis. Flores aufei, 
terminales, erecti, corymbosi; pedunculis unifloris, striatis, filiformibus, 
pilosiusculis, Cal. duplex, utringue multiplex: interior fusco-membranaceus, 
foliolis appressis ovato-lanceolatis disco subequalibus: exterior herbacets, 
laziüs patens, foliolis linerribus obtusis subpilosis. Radius neuter, auretes, 
Rlosculis 5 ligula elliptich oblonga planá tridenticulatá: discus nigricans, 
hermaphroditus, numerösus, flosculis tubulosis ö ids. Auth. nigra valvis 
apicularibus luteis ovatis acutis; basi mutica: fil. lutea. Stigmata exserta, 
replicata, linearia, acuta, plana, pilosa: stylus basi bulbosus. Sem. ob- 
é cuneata, transverse compressa, ancipitia, marginibus scabra, aristis 2. 
longis equalibus glochidato-barbatis deciduis coronata. Pappus 0. Recept. 
planum ACCUM 7 ne atro-fuscescentes, liseari-lanceolate, acute, Ri- 
fide. Don MSS. + 
An unpublished biennial species, native of Mexico; 
lately raised from seed communicated by Don José Pavon ~ 
to Mr. Lambert. 
442 
