Table 1.
Sequence representation on NCBI of the nine species used for testing our rbcL reference library, and congeneric species.
| Species | No. of rbcL sequences | No. of vouchered rbcL sequencesa | No. of species in genusb | No. of congeneric species with rbcL sequences | No. of congeneric species with vouchered rbcL sequencesa |
| Populus deltoides | 10 | 6 | 174 | 46 | 28 |
| Populus tremuloides | 14 | 7 | 174 | 46 | 28 |
| Broussonetia papyrifera | 15 | 11 | 31 | 2 | 0 |
| Carya illinoinensis | 2 | 1 | 47 | 10 | 6 |
| Bassia scoparia | 3 | 1 | 217 | 5 | 2 |
| Ambrosia artemisiifolia | 9 | 9 | 76 | 3 | 1 |
| Artemisia tridentata | 0 | 0 | 870 | 27 | 16 |
| Poa pratensis | 62 | 45 | 1613 | 94 | 93 |
| Zea mays | 13 | 0 | 32 | 0 | 0 |
a
A sequence is considered to be vouchered if the word “voucher” was found in the NCBI record. Further sequences may be associated with vouchers that are not included in the NCBI record, but are recorded in the associated publication.
b
Information obtained from the Tropicos online database (Missouri Botanical Garden, 2016). Species names that were invalid or illegitimate were excluded.