The American Orchid Society

Dendrobium-bilobum-Irene-CBR-(Provl)-20234879-2023-04-15 *SITF has confirmed this plant as Dendrobium bilobum (May 2023).

Although this Section of Dendrobium is poorly understood, the preponderance of characteristics places this plant within Dendrobium bilobum. Schlecter commented in the "Orchidacea of German New Guinea" that there is hardly any other section in which the distinguishing features of the species have presented such insuperable difficulties as this one. The most important characteristics in this Section seem to be the size of the leaves and their various parts, length and shape of the mentum, width of the petals and most importantly the shape of the lip. Schlechter also said that most of the individual species within Section Monanthos are inter-related and it is not easy to distinguish them. The leaves on this plant are a better fit to D. bilobum than to the closely allied species, D. erectifolium, which has much longer leaves than D. bilobum. This plant meets the description as detailed and illustrated in Lewis & Cribb's 1991 book, "Orchids of the Solomon Islands and Bougainville", although the flower size is large for D. bilobum.

Posted on Apr 15, 2023

bilobum vs erectifolium vs other ??

Dendrobium-polyanthum-2023-03-26 *SITF confirms this plant is Dendrobium polyanthum (Apr 2023).

There is a large amount of confusion between D. polyanthum, D. primulinum and D. cretaceum. Kew in the POWO considers D. polyanthum and D. primulinum to be separate species, however, many sources lists them as synonymous and many of the photos (OW and orchidroots) has them lumped together as D. polyanthum. The IOSPE lists them as separate species. There is an exact match to this plant in the POWO as D. polyanthum. Kew considers D. cretaceum a synonym for D. polyanthum. H. P. Wood in "Dendrobiums" described D. polyanthum and states,: "Discussions about the legitimate name of all three (polyanthum, primulinum, and cretaceum) go back more than a century." Wood stated he studied the type specimens at Kew and agreed with Kew that the correct name is D. polyanthum.

Posted on Mar 26, 2023

Plant was entered in the show as Dendrobium primulinum. The judging team thought this was Dendrobium polyanthum instead, so this needs to be identified to be certain.

Dendrobium-luzonense-2023-02-18 *SITF confirms this plant is Dendrobium luzonense (Apr 2023).

This plant is a good match in both form and color and the distinctive markings on the lip and column on an otherwise concolor flower; plant and flower measurements closely fit the description; plant is an excellent match to the original detailed description and drawing of D. luzonense in the Taiwania Journal published in 2007; good supporting photos may be found in several sources, including the IOSPE and OW; flower color is somewhat variable.

Posted on Feb 18, 2023

Dendrobium-convexipes-2023-02-12 *SITF has determined this plant not to be Dendrobium convexipes or any other known species in the Section, but probably an unknown hybrid (Jul 2023).

Our thanks to Dr. Andre Schuiteman, Internationally known Taxonomist, for his aid in identifying this plant. The petals of this plant lack any evidence of cilia along the petal margins; the leaves are not held in a single plane and the shape of the lip and crests are not close to that of D. convexipes. The leaves of D. convexipes twist 90 Degrees at their base to present all the leaves in a single plane; this is not shown on this plant. This plant does not key to any known species in the Section Calyptrochilus. Best guess might be a manmade hybrid, possibly between D. lawesii and D. subclausum.

Posted on Feb 12, 2023

Dendrobium convexipes J.J.Sm., Nova Guinea 14 (1929) 438, pl. 69, 85.Type: Lam 1423 (holo L); paraSynonyms:Chromatotriccum convexipes (J.J.Sm.) M.A.Clem. & D.L.Jones, Orchadian 13 (2002) 493S...

Dendrobium-merrillii-2022-12-14 *SITF confirms this plant as Dendrobium merrillii (Jun 2023).

Vegetatively this Section Aporum Dendrobium matches the dried specimen in the POWO. Color matches the description of milky white flower with purple markings on the side lobes and the size is within range. It is correct based on the description in Baker and Baker indicating a three-lobed lip with a small rounded midlobe and obscure, hairy side-lobes. Leaves are slightly imbricated and alternate up the inflorescence; the growth habit matches Baker and Baker. This plant also matches the description and excellent photographs of Dendrobium merrillii in the Monaco Nature Encyclopedia.

Posted on Dec 14, 2022

This plant belongs to me. It received a CBR. It was purchased from Accent Orchids, who either received it from Ching Hua or Phrao both out of Taiwan, but they each claim that they got them from someon...

Dendrobium-ramosii-2022-10-18 SITF has confirmed this plant as Dendrobium ramosii (Jan 2023); based on the finely toothed, simple lip and the ovary and segment shapes and sizes, as well as the leaf and cane size described with photos in Cootes' "Orchid of the Philippines" and the description in Baker & Baker's, Dendrobium Orchid Species Culture"; matches photos in the IOSPE, OW and orchidroots.com; there are apparently two color variations (pink and coerulea); flower size is on the small size of the range.

Posted on Oct 18, 2022

Dendrobium ramosii Ames, Philipp. J. Sci., C 7: 18 (1912). This name is accepted.

Dendrobium-x-suffusum-Georgias-Gift-CHM/AOS-2022-07-17SITF confirmed this as Dendrobium x suffusum (Jul 2022); distinguishing features of x suffusum are the combination of a plant that looks like a small gracilicaule, but with flowers that resemble D. kingianum in shape; this plant is consistent with these key characteristics, also the heavy suffusion of pink on the backsides of the segments is a characteristic of D. x suffusion.

Posted on Jul 17, 2022

Nine flowers and seven buds held slightly above the foliage of an 8 cm tall compact plant on four upright inflorescence, one inflorescence bearing sis flowers; extended ovoid pseudobulbs, 0.6 cm diame...

Dendrobium-wenzelii-2022-07-17SITF confirmed this as Dendrobium wenzelii (Jul 2022); D. wenzelii is heavily branched, 4-10 cm high with 1.2 x 0.5 cm triangular leaves and more or less singular flowers from the apex of the growths; a key characteristic is the presence of reduced, orange leaves at the top of the cane from which the flowers are produced; this plant measured somewhat higher, but otherwise in close range the photos show the diminished, glossy orange leaves on the blooming canes which match the description; a good match to the photo in the IOSPE; two photos in OW are in error and are of Ddc. wenzelii.

Posted on Jul 17, 2022

Dendrobium-ypsilum-2022-07-10SITF confirms this plant as Dendrobium ypsilon (not ypsilum) (Aug 2022); correct based on measurements of the plant segments and inflorescences, which arise near the apex of the pseudobulbs and the lip and mentum, which are both a match for this species; the flower image is very close to that on the IOSPE, OW, and several images in orchidroots.com.

Posted on Jul 10, 2022

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SITF Submissions and Findings

Dendrobium-bilobum-Irene-CBR-(Provl)-20234879-2023-04-15 *SITF has confirmed this plant as Dendrobium bilobum (May 2023).

Dendrobium-polyanthum-2023-03-26 *SITF confirms this plant is Dendrobium polyanthum (Apr 2023).

Dendrobium-luzonense-2023-02-18 *SITF confirms this plant is Dendrobium luzonense (Apr 2023).

Dendrobium-convexipes-2023-02-12 *SITF has determined this plant not to be Dendrobium convexipes or any other known species in the Section, but probably an unknown hybrid (Jul 2023).

Dendrobium-merrillii-2022-12-14 *SITF confirms this plant as Dendrobium merrillii (Jun 2023).

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