y hug the ground. There are other plants that form a
carpet of foliage, but the flower stalks rise higher. These include
white rock cress (_Arabis albida_), the permissible double buttercup
(_Ranunculus acris fl. pl._), the also permissible double German
catchfly (_Lychnis viscaria_), another double flower, "fair maids of
France" (_Ranunculus aconitifolius_), Carpathian bellflower (_Campanula
Carpatica_), grass pink (_Dianthus plumarius_), _Iris pumila_, crested
iris (_Iris cristata_), Christmas rose (_Helleborus niger_), _Phlox
divaricata_, _Phlox ovata_, _Phlox repens_, foam flower (_Tiarella
cordifolia_), _Veronica incana_, _Alyssum saxatile_, _Saxifraga
cordifolia_, and various avens (geum).

Several of the primulas give a like effect if the planting is close--as
it should be in a pocket. The best are the English primrose (_Primula
vulgaris_), cowslip (_P. veris_), oxlip (_P. elatior_), bird's eye (_P.
farinosa_), yellow auricula (_P. auricula_), _P. denticulata_, and _P.
Cortusoides_. Similarly, spring bulbs may be employed; plant them, for
the most part, under a ground cover so that the soil will not show when
they die down. Of the tulips, single ones of the early and cottage types
may be used, if in a solid color, but most to be preferred are the
species, such as the sweet yellow (Florentine) tulip of Southern Europe
and the little lady tulip (_Tulipa Clusiana_). Crocuses are also best in
type forms, and the small, single, yellow trumpet kinds are the finest
daffodil material. Single white or blue hyacinths may be used, but
better than the stiff spikes of bloom of new bulbs will be the looser
clusters of bulbs that have begun to "run out" in the border. Other
valuable bulbs are the snowdrop, _Scilla Sibirica_, glory-of-the-snow
(_Chionodoxa Luciliae_), guinea-hen flower (_Fritillaria Meleagris_),
grape hyacinth (_Muscari botryoides_), _Triteleia uniflora_, _Allium
Moly_, and the wood and Spanish hyacinths (_Scilla nutans_ and
_campanulata_).

Taller plants that may be worked in, oftentimes best with only a single
specimen or small clump, are autumn aconite (_Aconitum autumnale_),
_Yucca filamentosa_, leopard's bane (doronicum), single peonies (either
herbaceous or tree), German, Japanese, and Siberian iris, as well as the
yellow flag (_Iris pseudacorus_), single columbines, _Anemone Japonica_,
_Hemerocallis flava_, _Sedum spectabile_, _Dielytra spectabile_,
_Dielytra formosa_, Jacob's ladder (_Polemonium Richard