Dear Rick,
why do you think that your plant is Phrag. hincksianum?
It looks like a Phrag. longifolium, perhaps the forma gracile.
Phrag. hincksianum was described by H.G.REICHENBACH f. in The Gardeners` Chronicle 16th. february 1878, n.s. 9, Seite 202 and normally seen as a synonym of Phrag. longifolium. Here the description:
CYPRIPEDIUM HINCKSIANUM, (in Original n. sp.)*
Mr Wallis knew of there being a Selenipedium, or, as Orchidists say, a Cypripedium, near Cape Darien, and took means to secure it. Dr.Seemann had also made the discovery; he sent me his specimens glued to stiff paper, and rather unexaminable: I believed it was my Selenipedium Hartwegii. Later Dr.Seemann found a few flowers used by Mr.Fitch for his representation in the Herald of Botany, and sent me them as a present. Then I saw that Mr. Fitch`s surprising representaion of the small angli onside, near the base of the lip, was well founded; and thus I understood its being new, and called it (Cypripedium) (selenipedium) dariense. Mr.Wallis telt much pleased at having found what he thought C.Hartwegii. And now it flowers it proves distinct from all its allies by its long narrow lip having an almost conical long shoe. It is distinct from C.dariense in the want of those just mentioned basilar teeth in the unguis of the lip. The long lip is exceeding curious (provided it is constant, as I exspect). The inflexed lateral part of the lip is remarkably thick, cartilaginous. Both sepals are whitish green with dark green partly reddish veins. Petals light greenish, with a deep greenish middle line and brown border at base. Tails totally brown. Lip light green, with small brown spots near base. Staminode green, with brown back sides. My later description is compiled from my dry herbarium materials, our living plants in Hamburg Botanic Garden, and a fresh specimen for which I have to thank a most scientific and energetic collector of Orchids, T.C.Hincks, Esq.Breckenbrough, Thirsk, who appears to have first flowered it, and to whom it is dedicated with great pleasure.
H.G.Rchb.f.
*Cypripedium Hincksianum (n.sp.) - Foliis ligulatis loratis coriaceis; pedunculo elato apice plurifloro racemoso; bracteis heliconiaceis seu carinate triangulis acuminatis complicatis; ovariis calvis; sepalo dorsali oblongo ligulato obtuse acuto, limbo crispulo; tepalis a basi lata angustissime caudatis; Labelli calceo elongato conico utrinque supra ostium tumore ancipiti cavo, ima basi edentulo; staminodio transverse rhombeo postice veelutino.
- Selenipedium Hincksianum. H.G.Rchb.f.
Perhaps more detailde pictures of the lip could help in determination, if there is really a difference in your plant.
Perhaps also other mebers could show other plants which are labeled as Phrag. hincksinaum.
With best greetings
Olaf