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  Re: [Aroid-l] I.D.`ing some Meconostigmas ex: Brazil
From: a san juan <kalim1998 at yahoo.com> on 2007.05.07 at 03:14:09(15649)
I got one from brian williams labeled "P. adamantinum" and it looks like it is growing as such. It definitely is not a P. bipinnatifidum at least.Julius Boos wrote: >From : Julius Boos Reply-To : Discussion of aroids Sent : Friday, May 4, 2007 9:20 AMTo : aroid-l@gizmoworks.comSubject : [Aroid-l] FW: Philo. sps. seeds, S. Amer. Co.Dear Friends,Bear with me, I believe that we/I am pretty close to either solving OR giving up on this facet of my search for accuracy in this matter. I have not received any replies from anyone with whom Vic Soukup shared seeds, I can only HOPE that a few of you will step forward with information.I have made some notes on how anyone can I.D. a plant of any Meconostigma sp. mentioned by
Vic (below), this may help those of us who may STILL have plants mislabeled and grown from seed sent from this Company. I could not do a comparison chart as I had planned, my old comp. (or my dumb brain) would not let it be.Google these species, there are GREAT photos out there, Arlan San Juan and David Scherberich`s sites come to mind.SO---here goes--Philo. bipinnatifidium.This seems to be the species that MOST of the seeds from Brazil, labeled as other species, grew up to be, so I will start here. It is a HUGE species, but we may have been dealing with smaller, sub-adult plants.Adult leaf blade often over 30" long, many divisions that are bipinnifed/divided, secondary divisions generally at least 6 cm. long. In juvenile/sub-adult plants there are sometimes no bipinnate/secondary divisions.Distances between the bottom of the sinuses (the spaces between the divisions) and the midrib INCREASE
starting from the tip of the leaf blade, and going upwards toward the juncture with the petiole.Intravaginal squamules (the many thorn-like structures surrounding the point where the petiole joins the rhizome or 'trunk') are long (5-12 mm, 2-4mm wide at base), flattened, pointed and chessnut-red in color, easily detachable.Leaf-scars on trunk are elongated/oval, aprox: 6.5 wide X 5 cm high, colored light gray, with dark gray margins.Petioles sulcate in cross section.(Juvenile plants of this species sometimes can resemble P. saxicolum, but at this stage will have NO visible rhizome/trunk).P. adamintinum.This is a SMALL species, leaf blades in adult plants from 6 1/2"-13" long! Anterior divisions of leaf blade only sometimes have secondary divisions, very small/short, no more than just a 'scallop', under 1 cm long.Distances between the bottom of the sinuses and the midrib DECREASE as you move from the
tip upward toward the juncture of the petiole.Intravaginal squamules decidious (falling off), sometimes persistant, small, 0.1-0.2 mm.Leaf scars on rhizome/trunk are greenish-gray w/ chessnut margins, elliptic toPetiole elliptic to round in cross section.P. saxicolum.Another smaller species.Leaf blade no longer then 12"- 18" , divisions not as deep as in near/adult P. bipinnatifidium or especially P. adamintinum, never divided.As in P. bipinnatifidium, the distances between the bottom of the sinuses and the midrib INCREASE from the tip upwards toward the juncture with the petiole.P. paludicola.Leaves held errect to semi-errect.No intravaginal squamules on THICK rhizome/trunk.Leaf blade with shallow divisions.Distances between the bottom of the sinuses and the midrib increase rapidly from tip towards petiole juncture.P. eichleri ( I THINK!) may be a hybrid between P.
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