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Note: Ranking & SRDUs are purely hypothetical without any quantitative data to support them.

The Deadly Pisonia Tree Of Tropical Pacific Islands

T wo more hitchhikers with Wayne’s Word ratings of 10 SRDUs are krameria (Krameria grayi) and stick-tight (Desmodium cuspidatum). Krameria is a small, purple-flowered shrub of the Colorado Desert region of southeastern California. The amazing hitchhiker fruits are like miniature versions of the legendary Uncarina of Madagascar. The fruit is covered with radiating spines, each spine tipped with several minute hooks or barbs resembling a tiny harpoon. In a related species (K. parvifolia) the barbs are scattered along the upper portion of each spine. Although the flowers resemble a lovely orchid, krameria actually belongs to its own family, the Krameriaceae. Kramerias are also quite fascinating because they are partially parasitic on the roots of nearby shrubs.

T he easily fragmented stem segments of jumping cholla are one of nature’s most effective methods of hitchhiking and vegetative reproduction. Thickets of jumping cholla covering entire hillsides or alluvial fans may have developed from fragmented stem segments that became rooted in the desert soil. Although jumping cholla produces flowers, the seeds of most populations are typically sterile and reproduction is accomplished without sexual reproduction (technically referred to as apomixis). You could say that jumping cholla is a master in the art of hitchhiking and cloning itself.

Additional Hitchhiking Plants: Photographed Since Original Publication of This Article

– Spreads by both seeds and stolons

– Produces shoots and seeds

NutsedgeCvperus esculents (yellow – left), Cvperus rotundus (purple – right)

Florida Pusley(Richardia scabra)

CrabgrassDigitaria sp.

Clover (white)Trifolium repens

– Grows from rhizomes, tubers, and seed