Pinguicula lutea

Pinguicula lutea

TAXONOMY:

Family : Lentibulariaceae

Genus : Pinguicula

Name : Pinguicula lutea

Sub-classification (Casper) : link

Publication : by Walt. in Fl. Carol. (1788) n°63

Others :

Pinguicula lutea f. alba Folkerts & Freeman (1989)

Pinguicula lutea var. edentula A. DC. (1844)

Pinguicula lutea var. minor A. DC. (1844)

DESCRIPTION : In Casper

Perennis. Rhizoma simplex breve radicibus adventitiis funiformibus numerosis. Folia numerosa radicalia rosulata integerrima ovato-oblonga rotundata basin versus in petiolum angustata apicem versus margine +/- involuta; superne glanduloso-viscosa glandulis sessilibus dense et glandulis stipitatis disperse vestita, basin versus utrimque nervi mediani et in margine pilosa pilis singularibus longis; (15) 20 - 65 (86) mm longa (6) 9 - 19 (24) mm lata luteo-viridia. Hibernacula nulla. Pedicelli (1) 2 - 4 (6) erecti glandulis stipitatis modice dense apicem versus dense obtecti (57) 130 - 340 (443) mm alti uniflori. Flores maximi (19) 23 - 36 (42) mm longi (calcari incluso). Calyx bilabiatus viridis extus glandulis stipitatis dense vestitus; labium superum trilobum lobis usque ad basin fere divisis oblongis raro ovalibus late rotundatis obtusis vel raro acutiusculis (3) 5 - 8 mm longis 2 - 3 mm latis; labium inferum ad dimidium longitudis bilobum lobis ovato-triangulis late rotundatis paulum divergentibus 2 - 3.5 mm longis. Corolla suisoloba sulpureo-lutea vel flava extus glandulis stipitatis disperse vestita; lobi latiores quam longi subobcordati vel obovati (6) 10 - 15 (16) mm longi (7) 11 - 18 (21) mm lati usque d 1/3 - 1/2 longitudinis incisionibus (1 - 3 ) obtusis vel subrotundatis seiuncti basi loborum glandulis stipitatis disperse vestita. Tubus subcylindrico-infundibuliformis viride-luteus latere ventrali venis purpureis conspicuis et glandulis stipitatis disperse vestitus (6) 8 - 11 (15) mm longus (5) 6 - 9 (11) mm latus intus pilosus cum palato et cymatio palati. Palatum +/- 6 mm longum flavum pilis flavis pluricellulatis longis tenuibus clavate capitatis. Calcar subcylindricum apicem versus angustatum obtusum vel acutiusculum rectum vel subincurvum luteum(3) 5 - 8 (10) mm longum 1 - 2 mm latum cum tubo angulum subrectum formans. stamina +/- 3 mm longa; filamenta albida; antherae reniformes luteae; pollen (4) 5 - 6 (7) colporatum. Ovarium subglobosum glandulis stipitatis dense obtectum. Stigma bilabiatum flavo-albidum labiis late ovalibus fimbriatis; labio infero maximo superne papillato; labio infero subulate piloso. Capsula subglobosa 5 - 8 mm diametro calyce incluso. Semina scobiformia numerosa fusiformia 0.5 - 0.8 mm longa alveolata.

Chromosomata 2 n = 32

Floret II – IV (V)

Translation :

- soon -

ORIGIN AND HISTORY :

From South east of the USA.

Localisation / Map:

Pinguicula lutea lives in the south-east USA and can be found in Florida, along the Gulf Coastal plain from north to southeast North Carolina to the eastern area of Louisiana.

(click on the map for better location and relief map)

HABITAT:

Pinguicula lutea prefers a drier habitat than the other Pinguicula of the Southeast USA.

It grows in sandy bogs and open pines wood area.

THREATS :

All carnivorous plants are threaten by drainage of site, degradation of water quality and all human activities.

Introduction in culture :

This plant can be found worldwide in carnivorous plants nurseries.

CULTURE AND MULTIPLICATION :

(North hemisphere, France near Paris, in a garden - see the map -)

Life cycle : This species, native from Southeastern USA, stay all the time under rosette form. They rise beautiful yellow flowers from march to may according to temperatures.

These plants require a little dormancy each winter but temperatures must be cool. During this time, the plant will remain green, but will slow down growth. The plants doesn’t have really cold winter in his habitat. With the rise of spring temperatures, the plants will begin a new growth cycle. In culture, the plant prefers to stay around 10 - 15 °C during winter.

Media: The plants grow in a mix of 1/2 peat and 1/2 non calcareous sand.

Pot : Pinguicula lutea can be grown using the tray method so all kind of pots can be use. I grow mine in a large plastic pot.

Cultivation : Pinguicula lutea is a warm-temperate species. The temperatures ranges from 10° to 30° C. I have noted that this species can stay alive with colder temperature even under 5°C but the plant is reduced to a green heart and need a long time to regrow in spring. It is better and safer to keept the plants in winter around 10 - 15°C.
The soil should be kept a little wet but this species seems to love drier conditions.

A good aeration is also necessary for Pinguicula lutea to avoid a rotting of the plants.

The light can be high even with direct sun but this species seems to be sensitive to important variations of temperature.

Here are the growing tips of Bob McMorris, one of the best grower I know for these species (personnal communication with Bob on September 29th 2001) :
"I would suggest 50% peat, 50% sand for P. lutea, P. caerulea and P. pumila (actually P. pumila occurs all the way south into the Florida Keys and the Bahamas, where they grow in pockets of limestone with perharps a bit of sand and decomposed plant matter; so I suspect this species can grow with a bit of vermiculite and less peat. The last three species); P. planifolia, P. primuliflora, and P. ionantha generally grow in very wet areas, with P. primuliflora having been recorded as growing under water along the edges of streams.
I grow these species with a base of peat and then the upper layer of live Sphagnum. The seeds should be started on peat and then when large enough (perhaps the second season) moved into Sphagnum. The first 3 (P. lutea, P. caerulea and P. pumila) are usually found along side the road in low grasses where they get quite a lot of sun. The ground is usually damp not wet. The latter 3 (P. planifolia, P. primuliflora, and P. ionantha) are usually found in much wetter locations, but still receiving quite a lot of sun. I have grown them on the tray system under lights with success, however they do much better outdoors with full sun."

Multiplication : Some plants in culture forms seeds but I never get once.