-376 Part IV. Chapter 2. 
(Picea-Association). Where the conditions are a! favorable they may be ı—2 feet 
high. Ledum latifolium (= L. groenlandicum) is abundant in almost pure growth (Ledum- 
Association). Potentilla (Sibbaldiopsis) eidenbite en: pure association (Potentilla-Asso- 
ciation) as also Diapensia lapponica (Diapensia-Association)., Geum a Arenaria 
groenlandica, Empetrum nigrum, Solidago virgaurea var. alpina, Vaccinium vitis-idaea, Houstonia 
coerulea, Lycopodium selago are abundant, while Veratrum viride, Castilleja en var. septen- 
trionalis (= C. pallida), Epilobium anagallidifolium, Stellaria borealis form an association in wet 
places (Castilleja-Association). Silene acaulis, Arctostaphylos (Mairania) alpina, Rhinanthus 
eristagalli, Polygonum viviparum have all been found on the eastern border of the Garden. 
Formation. The sphagnum bogs on the summits are filled with Empetrum nigrum, 
Vaceinium (Oxycoccus) a Carex magellanica, C. pauciflora, Prenanthes (Nabalus) Bootii, 
Diapensia lapponica, Vaccinium caespitosum are found in exposed situations, Polygonum vivi- 
parum in the dry cold c ei Viburnum pauciflorum, Salix phylicifolia in moist alpine ravines; 
Salix uva-ursi, S. balsamifera, Betula papyrifera var. minor among the alpine rocks and Comandra 
livida in evergreen shaded bogs. 
The constituent flora of the summit proper of Mt. Washington is characterized by the — 
abundance of Arenaria groenlandica with such other aue= as a wars eu i 
pensia . nie ae (Nabalus) Bootii, P. (N.) nana, Carex rigida, schen 
(Chamaeeistus) Glen ‚ Silene acaulis, Geum radiatum var. Peckii, Pohenkti 
tridentata, Solidago Vekährei var. alpina (= S, alpestris), Vaccinium vitis-idaea, Phleum alpinum, 
Renee selago, while Sibbaldia procumbens the rarest of White Mountain plants and lost 
o sig r many years has recently been en ee on Mount Washington. 
Flowering-times of some alpine spec 
June 30 Vaceinium uliginosum and a. Cassiope, Bryanthus, Kalmia glauca, 
Rhododendron lapponicum, Loiseleuria, Diapensia, Oxyria digyna, the three Salices, Betula 
glandulosa, Empetrum and Viburnum pauciflorum. Silene acaulis, Cardamine bellidifolia, Juncus 
trifidus, Carex rigida var. ee be seirpoidea, Luzula spicata. 
Vaceinium Vitis i ‚ Ledum latifolium, Rubus chamaemorus, Viola palustris, 
Paronychia argyrocoma, Geum En var. Peckii, Potentilla tridentata, Castilleja pallida var. 
septentrionalis, Hierochlo&@ borealis and alpina. 
B: I Arenaria groenlandica, Epilobium alpinum, Arnica mollis, Prenanthes (Nabalus) 
nana, Veronica alpina, Polygonum viviparım, Phleum alpinum, Agrostis canina, Poa laxa, Habe- 
naria obtusata and dilatata. 
August ıst. Solidago virgaurea var. alpina, Prenanthes (Nabalus) Bootii, Alectorolophus 
Cristagalli. 
The following is the list of plants ’) found in New Hampshire only 
on alpine summits. Those found also in Europe are marked by an asterisk. 
*Polygonum viviparum L. *Silene acaulis L. 
5 re 
u. digyna Hill. Arenaria groenlandica Spreng. 
Mr nigrum L. *Dryas integrifolia Vahl. 
Betula glandulosa Michx. Geum radiatum Michx. var. Peckü 
Salix uva-ursi Pursh. ursh. 
> argyrocarpa Anders. *Sibbaldia procumbens L. 
: > herbacea L. *Potentilla frigida. Man. ed. 6 (= P. 
Cardamine bellidifolia L. obbinsiana Oakes.) 
* “ } [2 u 
Viola palustris L. *Saxifraga rivularis L. 
ı) This list is made up from my list of plants; also in Among the Clouds XXIV: 3 July 23 
1900; Hitchcock, C, H.: The Geology of New Hampshire I: 571. 1874. 
$2. 
