Arisaema species D-G are found on this wiki page
Arisaema dracontium is a medium sized (40 cm. tall) May flowering species native in North America, also called 'Green Dragon'. The plant in the picture is just unfolding its leaves. Note the spathe is below the leaves. This is one of the differences between A. dracontium and Pinellia pedatisecta, a plant that is very similar and often confused with this species. Pinellia pedatisecta is a bit taller (up to 80-90 cm.), produces many spathes during the same growing season and the spathes, whose peduncles grow separated from the stem, are above the leaves. The pedate leaf is similar but the central leaflet is longer than others in Pinellia, shorter in A. dracontium which produces only one spathe per year, with the peduncle originating from the stem. The fruit spike is different with green seeds without pulp but covered only by a thin membrane in Pinellia and the seed pod not completely separated from the spathe.The second picture shows the leaves with central leaflet shorter than others. Photos by Giorgio Pozzi, May 2008.
Arisaema elephas Note the vertical spadix appendix exerted over the spathe. A medium size plant, it has a purple spathe with white veins. Grown and photographed [photos 1-2] by Giorgio Pozzi, May 2006. Photos 3,4 were taken in its habitat in Sichuan by Oron Peri.
Arisaema engleri The plants were received from Chen nursery (China) as A.12/A.28 with a wrong name (A. sikokianum). The first picture shows a green spathe; the second picture shows a purple spathe: March 2006. The third picture shows the detail of the inner portion of the spathe and the last shows a clump flowering in open ground: April 2007. Grown and photographed by Giorgio Pozzi.
Arisaema erubescens This plant is about 80 cm. tall , native in Nepal, often confused with A. consanguineum , the spathe is pinkish with white stripes, some specimens with green spathe have pinkish stripes and are reddish at bottom, the leaves don't show filiform extensions typical in A. consanguineum.
Arisaema exappendiculatum This tall species (up to 1.2 m.) is similar to A. concinnum with indistinguishable leaves and a green or purple inflorescence. The spathe hasn't a visible spadix appendage. This absence gives the name to this species. The margins of the spathe's limbs are overlapped, hiding the male or female spadix. The plant produces stolons each year that extend up to 50 cm. from the tuber and a rich clump is formed in a short time. The first picture shows the plant while the spathe is still unfolding, the second picture shows the leaves, and the third shows the spathes unfolding one week later. Photos by Giorgio Pozzi, May 2008.
Arisaema fargesii is a species that offsets freely, but has an attractive purple/white striped spathe. The tuber is reddish and somewhat glossy. Trifoliolate leaves with a large apical leaflet turn a pleasant golden in the fall. It is very similar to Arisaema franchetianum, but differs in having strongly recurved mouth-margins, whereas A. franchetianum does not. The first three photos were taken by Mark Mazer. The last two photos were contributed by Paige Woodward.
Photos 1-5 by Arnold Trachtenberg of plants from from Chen Yi in China. The large leaf obscures the spathe below. Photo 6 illustrates another plant from Chen nursery, grown and photographed by Giorgio Pozzi, April 2005.
Arisaema flavum comes in many different clones varying in size of plant and flower and intensity of color of the flower. It is the commonest species in cultivation, probably owing to its setting seed freely by self-pollination. It has cute, tubby little yellow flowers and pedatisect leaves, radiating in a fan from the petiole. Size varies from about a foot at first flowering to 3' in the "giant form". It is native to China and Yemen. Photos 1,2 by John Lonsdale, photo 3 in its habitat in Sichuan by Oron Peri, photo 4 by David Pilling.
Arisaema franchetianum is very similar to A. fargesii. It is difficult to separate them as their characters give a continuum of forms and colours. A. franchetianum has a more galeate spathe; these plants have a reddish colour. Grown and photographed by Giorgio Pozzi, May 2006. The first picture shows the plant, and the second picture shows the spathe.
Arisaema galeatum has a recurved helmet-like spathe just like A. ringens, but is plain green to brown-purple with whitish veins and purple inside. It grows in the high forests of the Sino-Himalayan area. Grown and photographed by Giorgio Pozzi, May 2006. The plant shown in the first picture is from 100/120 cm tall; the second picture is a close-up of the flower. The third picture is of another view and the fourth shows a clump in cultivation in pots May 2006. The last picture shows the plants in ground in the woods May 2008; the plants are now over 1 m tall.
Arisaema griffithii is a stunning plant with an impressive spathe. This plant came from Ganesh Mani Pradhan nursery (India). The male specimen is shown below, grown and photographed by Giorgio Pozzi. The second photo is a close up of the male spadix. Note the long spadix appendix. The third image shows a couple of plants in the garden, male at left, female at right, the fourth picture shows a classic spathe, April 2007. "During the last two years I harvested seeds from this species from different plants. They were fine and appeared healthy. I tried to start the germination process with some seeds just after the fruit spikes were ripened; no germination took place but the seeds developed fungus and soon were rotten. The same happened with the seeds I sent to a friend in USA. The remaining few seeds which were stored into the fridge till the following spring could germinate with a rate about 50% and I could collect nearly 25% tuberlets. Maybe this species doesn't like immediate germination process but these seeds need a period with partial water loss at low temperature to complete the ripening process so fungus cannot assault them." The fifth photograph by Pontus Wallstén shows a tuber of Arisaema grifithii var pradhanii on the right compared with a tuber of Arisaema kiushianum.