339 



by the extension of the placentae. Seeds numerous, tuber- 

 culate. [Named from John Martyn 1693—1768, professor 

 of botany at Cambridge, England]. About 8 species, natives 

 of Am. Terwijl de beschrijving van de soort daar luidt: 



Marty nia Louisiana Mill. Unicorn Plant. Elephants 

 Trunk, Double-claw. Annual, densely glandular pubescent 

 all over; stem stout, much branched, the branches prostrate 

 or ascending 1° — 3° long. Leaves broadly ovate to 

 orbicular, rounded at the apex, cordate at the base, repand 

 undulate or entire, 3' — 12' in diameter, the petiole stout, 

 mostly longer than the blade, bractlets at the base of 

 the calyx oblong or linear, deciduous; calyx somewhat 

 cleft on the lower side; racemes several-flowered; pedicels 

 slender, corolla whitish or yellowish mottled with purple 

 or yellow within. IV2' — 1' long, the limb nearly as broad, 

 the lobes obtuse; stamens all anther-bearing; fruit strongly 

 curved, 4' — 6' long when mature, the beak longer than 

 the body, splitting into 2 elastically diverging segments, 

 the endocarp crested on the under side only. In waste 

 places, escaped from gardens, Maine to New Jersey and 

 North Carolina. Native in the Mississippi Valley from 

 Iowa and Illinois southward July^ — Sept. 



Volgens Thellung Fl. de Montpel. 481 (1912) was de 

 soort in den tijd van Gouan in de omgeving van de Jardin 

 des Plantes te Montpellier ingeburgerd in 1762, maar in 

 1796 weer verdwenen. Dit klopt met de opmerking in 

 Caroli Linnaei Syst. Gen. Spec. Plant. ed. Richter p. 598 

 (1840). Monspelii quasi spontaneam indicat Linn. in Am. 

 ac. 8 p. 8. 



11. Bidens pilosa L. (s. 1.) te Wormerveer Oct. 1918. 

 Dergelijke planten, steeds zonder bloemen of vruchten, 

 meest te Wormerveer, ook te Rotterdam waargenomen, 

 werden vroeger als vermoedelijk tot B. bipinnata L. te 

 behooren gedetermineerd. Nu heb ik deze plant tot bloei 

 weten te brengen, en toen bewezen de kleine gele hnt- 



