Reciprocal cleft and pistillate floral bud grafts were made between parthenocarpic ;Fertilla' and nonparthenocarpic ;MSU 713-5' cucumber (Cucumis sativus L.) lines to localize the site for stimulation of parthenocarpic fruit set. No fruit set on ;MSU 713-5' controls, scion grafted to ;Fertilla,' or rootstock with ;Fertilla' as the scion. ;Fertilla' controls, rootstock, and scions all produced p...

In French Guiana, Philodendron fragrantissimum (Hook.) G.Don was specifically pollinated by a single species of night-active cyclocephaline scarab, Cyclocephala simulatrix Höhne. Its inflorescences exhibited short-lasting anthesis (~30 h) and characteristic floral traits such as thermogenesis, edible/nutritious tissues, profuse scent emission. Our insect exclusion experiments indicate that ento...

Diffusetes from seedlings and root exudates from 6-week-old plants of a monoecious line of cucumber, Cucumis sativus L., contained considerably higher levels of gibberellin.(GA-)like substances than did those from plants of an isogenic gynoecious line. Most of the GA4ike activity was found in a chromatogram region ty.pical of GA1 and GA3; some activity, particularly in root exudates, appeared a...

Honckenya peploides is the most common plant species on the island of Surtsey. It arrived in 1967 and after a juvenile period of 4 years it produced seeds and had increased its number from below 100 to several millions. Most populations had the individuals distributed in a regular or random pattern, suggesting that intraspecific competition is important. H. peploides has a subdioecious reproduc...

Honckenya peploides is the most common plant species on the island of Surtsey. It arrived in 1967 and after a juvenile period of 4 years it produced seeds and had increased its number from below 100 to several millions. Most populations had the individuals distributed in a regular or random pattern, suggesting that intraspecific competition is important. H. peploides has a subdioecious reproduc...

Isachne veldkampii var. malabarica, a new variety is described from the wetlands of Kasaragod, Kerala. It can be distinguished Bhat & Nagendran by presence two types leaves - ligulate and non-ligulate,1–4 spikelets in each panicle branch 2 florets which are either both pistillate, bisexual or upper pistillate lower bisexual. Description along with figures, illustrations distribution map pro...

As revised here, Discocarpus is interpreted to consist of three neotropical species: D. essequeboensis Klotzsch, D. gentryi S. M. Hayden, which is described and named herein as new to science, and D. spruceanus Mull. Arg. One previously accepted name, D. brasiliensis Klotzsch ex Mull. Arg., is reduced to synonymy of D. essequeboensis. Lectotypes are proposed for the two species previously descr...

In one of expeditions realized by Missouri Botanical Garden in May 2019, we found a small tree as part the project "Diversity flora and its relationships with soil, wild area Cordillera Azul National Park"; examining botanic samples be carefully realizing respective comparisons, arrived to conclusion that it has different characteristics from others species Virola. Therefore would new fo...

BACKGROUND AND AIMS Macaranga (Euphorbiaceae) is a large genus of dioecious trees with approx. 260 species. To date, only one pollination study of the genus has reported brood-site pollination by thrips in M. hullettii. In this study, the pollination system of Macaranga tanarius is reported. METHODS The study was conducted on Okinawa and Amami Islands, Japan. Flower visitors on M. tanarius we...