In 1983 the UK Mammillaria Society launched a survey to see what Lau field collections had found there way into members collections. The result was that out of the 364 relevant Lau number, at the time, 153 could be found in UK collections. By the time Lau stop collecting in 1989 he had made 390 field collections.
After over 20 years some of use would like to revive this survey, to see how many different Lau field numbers are still in our collections, has a testament to Lau's legacy.

Going throught my own collection I have found that I have 74 Lau collections made up of mature plants, seedlings and seed awaiting sowning.

I am asking fellow forum members to take part in this new survey and list ANY Lau field numbers you may have in your collection to help us build up has complete a picture as possible. If you could indicate what you have in the format outlined below I would be grateful. If you have too many field collections to list below then send then to me in a Message or E-mail.
If this proves to be sucessful then I may do the same with Reppenhagen's field numbers.

1182 bocasana plant
775 boolii seedling
007 neopalmeri seed

Thank you for your assistance.

These are the 54 Lau numbered plants that I have, Tam, some are still quite young though.
Lau 022 insularis
Lau 044 dioica
Lau 052 petrophila petrophila
Lau 055 armillata
Lau 068 albilanata oaxacana
Lau 081 sheldonii
Lau 086 standleyi
Lau 099 multidigitata
Lau 1020 melanocentra melanocentra
Lau 1042 wrightii wolfii
Lau 1042 wrightii wolfii
Lau 1045 pettersonii
Lau 1047 densispina
Lau 1048 jaliscana jaliscana
Lau 1050 jaliscana jaliscana
Lau 1063 picta picta
Lau 1069 winterae aramberri
Lau 1083 aureilanata
Lau 1087 dixanthocentron
Lau 1090 candida
Lau 1096 guerreronis
Lau 1104 eriacantha
Lau 1108 halbingeri
Lau 1116 supertexta
Lau 1118 gigantea
Lau 1125 oteroi
Lau 1132 supertexta
Lau 1163 wagneriana
Lau 1170 roseoalba
Lau 1186A glassii glassii
Lau 1223 carmenae
Lau 1223 carmenae
Lau 1245 berkiana
Lau 1249 scrippsiana
Lau 1296 melanocentra rubrograndis
Lau 1322 glassii ascensionensis
Lau 1337 brachytrichion
Lau 1337 brachytrichion
Lau 1374 albicans albicans
Lau 1434 johnstonii
Lau 1495 huitzilopochtlii niduliformis
Lau 1495 huitzilopochtlii niduliformis
Lau 1496 lauii nova
Lau 1500 huitzilopochtlii huitzilopochtlii
Lau 1529 wagneriana
Lau 1537 glassii
Lau 25 maritima
Lau 612 miegeana
Lau 621 marksiana
Lau 694 moelleriana
Lau 696 mercadensis
Lau 761 xaltianguensis bambusiphila
Lau 772 bocensis
Lau 775 boolii

As seedlings from last year's sowings, I have

Lau 1222 laui subducta
Lau 698 moelleriana
Lau 1334 moelleriana

Seed yet unsown,

Lau 1018 elegans
Lau 007 neopalmeri
Lau 1445 pennispinosa nivosa (?)
Lau 1300 pygmae
Lau 1507 columbiana yucatanensis

Thanks Chris, really usefull. You have 20 field numbers that I do not have so your 20 + my 74 gives us 94 out of 390, that's amazing. Hopefully some of the others will help us get that figure down further.

I have Mam. roseoalba L1170 (bought by Uhlig Kakteen) and Mam. dixanthocentron 'celsiana' L.1087 (from seed Mam. Society)

Bart - Flanders

For the interest of all I have the following field numbers..

Plants....034 albicans 1374 albicans 1182 bocasana 1223 carmenae 1537 glassii
775 boolii 1059 dixanthocentron 1104 eriacantha 1096 guerreronsis ? 022 insularis
1048 jaliscana 1171 lauii lauii 621 marksiana 635 marksiana 1296 rubrograndis
612 miegiana 1514 miegiana 1334 moelleriana 099 multidgitata 1135 sp. 035 sp.
619 standleyi 086 standleyi 1529 wagneriana 761 bambusiphila 1196 zephranthoides

seedlings/seed....068 albilanta 1128 ignota 1245 berkiana 1363 carmenae
1165 leucantha 065 crucigera 1109 tlalocii 1047 densispina 044 dioica
018 angelensis 1059 dixanthocentron celsiana 1087 dixanthocentron celsiana
060 dixanthocentron 1118 gigantea 1132 haageana 1154 heidiae 711 herrerae
066 huitzilopochtli 1495 huitzilopochtli niduliformis 1055 aureispina 1314 leptacantha
1044 jaliscana 1050 jaliscana 1496 lauii form 1224 lauii dasyacantha 1357 priessntizii
763 occidentalis 696 mercadensis 698 moelleriana 007 neopalmeri 632 orcutii 1063 picta
1145 pennispinosa 1357 petterssonii 1170 roseoabla 070 pseudoscrippsiana 671 solioides
11234 sonorensis 1116 supertexta 774 tayloriorum 1073 wagneriana 1042 wrightii wolfii
1079 wilcoxii (wrightii) 020 fraileana 1108 halbingeri 052 petrophila 1155 xaltianguensis

I can now another 15 Lau numbers from a recent addition to my collection;

Lau 006 dioica
Lau 029 lewisiana
Lau 045 marshalliana
Lau 077 mazatlanensis occidentalis
Lau 671 solisioides
Lau 1037 beneckei v. balsasoides
Lau 1079 meridiorosea
Lau 1083 aureilanata
Lau 1144 guillauminiana
Lau 1218 centricirrha
Lau 1250 longiflora stampferi
Lau 1259 mundtii
Lau 1272 evermanniana
Lau 1361 crinita
Lau 1435 nagliana

and I think that's 14 more to the grand total, as I think only solisioides is duplicated in your list Tam, making it 108.

In my collection:

Plants:
081 gueldemanniana var. guirocobensis
082 hertrichiana
086 hertrichiana
612 miegeana
1018 conspicua
1048 jaliscana
1063 picta
1334 moelleriana

Regards,

Carl

Thanks for the help Carl you have added a new one to the list, Lau 082, making 109. Can any one else offter any more too help us further.

I have plants with 56 different Lau numbers in my collection.
If I removed the one's above correctly, I can add the following:

017 angelensis
1332 anniana
1045 apozolensis v.saltensis
1069 crassimammillis
1219 dasyacantha
677 flavicentra
1322 glassii v.siberiensis
1234a hertrichiana
1557 huitzilopochtlii
1046 jaliscana fa.
1434 johnstonii
1222 laui fa.
1134 cobrensis(lindsayi)
1345 " " "
694 moelleriana
1091 manacistracantha
716 painteri
1118 petterssonii
1259 wiesingeri

Thanks for your input Walter. You have been able to add another 13, bringing the number up to 121 collections.
Just to pick up on two lots....In the lau field list 017 is estebanensis, 018 is anglensis and Lau 1345 is listed has longflora.
Regarding Lau 1134. Could you tell me what flower colour this is and if possible, could you E-mail me a photo of the plant. My plant of Lau 1135 is just starting to produce its red flower buds and It would be useful to be able to compare them.

Sorry, it should be 1135 instead of 1345

About the Lau 017, that is a mistake in Filbeams book, it is not comming from Isla Esteban, but from Isla San Lorenzo, and has nothing to do with var.estabenensis.

Thanks for the heads up on that. I will get that checked out with David Hunt who has Lau's data sheets.
There is also a plant missing from the Lau list in Pilbeam's book..
Lau 1529 obscura/wagneriana.